Chandrayaan-3
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Chandrayaan-3 ( ) is the third mission in the
Chandrayaan programme The Chandrayaan programme ( ) (Sanskrit: 'Moon', 'Craft, Vehicle', ) also known as the Indian Lunar Exploration Programme is an ongoing series of outer space missions by the Indian Space Research Organisation (ISRO) for the exploration of the ...
, a series of lunar-exploration missions developed by the
Indian Space Research Organisation The Indian Space Research Organisation (ISRO ) is India's national List of government space agencies, space agency, headquartered in Bengaluru, Karnataka. It serves as the principal research and development arm of the Department of Space (DoS), ...
(ISRO). The mission consists of a ''Vikram''
lunar lander A lunar lander or Moon lander is a Lander (spacecraft), spacecraft designed to Moon landing, land on the surface of the Moon. As of 2024, the Apollo Lunar Module is the only lunar lander to have ever been used in human spaceflight, completing s ...
and a ''Pragyan''
lunar rover A lunar rover or Moon rover is a space exploration Rover (space exploration), vehicle designed to move across the surface of the Moon. The Apollo program's Lunar Roving Vehicle was driven on the Moon by members of three American crews, Apollo 15, ...
, as replacements for the equivalents on
Chandrayaan-2 Chandrayaan-2 (; from Sanskrit: , "Moon" and , "craft, vehicle") is the second lunar exploration mission developed by the Indian Space Research Organisation (ISRO) after Chandrayaan-1. It consists of a lunar orbiter, the ''Vikram'' lunar l ...
, which had crashed on landing in 2019. The spacecraft was launched on July 14, 2023, at 14:35
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from the Satish Dhawan Space Centre (SDSC) in Sriharikota, India. It entered lunar orbit on 5 August, and touched down near the
lunar south pole The lunar south pole is the southernmost point on the Moon. It is of interest to scientists because of the lunar water, occurrence of water ice in Crater of eternal darkness, permanently shadowed areas around it. The lunar south pole region fea ...
, at 69°S, on 23 August 2023 at 18:04 IST (12:33
UTC Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communica ...
). With this landing, ISRO became the fourth national space agency to successfully land on the Moon, after the
Soviet space program The Soviet space program () was the state space program of the Soviet Union, active from 1951 until the dissolution of the Soviet Union in 1991. Contrary to its competitors (NASA in the United States, the European Space Agency in Western Euro ...
,
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
and
CNSA The China National Space Administration (CNSA) is a government agency of the People's Republic of China headquartered in Haidian, Beijing, responsible for civil space administration and international space cooperation. These responsibilities ...
, and the first national space agency to achieve a soft landing near the lunar south pole. The lander was not built to withstand the cold temperatures of the lunar night, so it was shut down at sunset over the landing site, twelve days after landing. The orbiting propulsion module remained operational and was repurposed for scientific observations of Earth; it was shifted from lunar orbit to a high Earth orbit on 22 November 2023,where it remained in service until 22 August 2024.


History

On 22 July 2019, ISRO launched
Chandrayaan-2 Chandrayaan-2 (; from Sanskrit: , "Moon" and , "craft, vehicle") is the second lunar exploration mission developed by the Indian Space Research Organisation (ISRO) after Chandrayaan-1. It consists of a lunar orbiter, the ''Vikram'' lunar l ...
on board a Launch Vehicle Mark-3 (LVM3)
launch vehicle A launch vehicle is typically a rocket-powered vehicle designed to carry a payload (a crewed spacecraft or satellites) from Earth's surface or lower atmosphere to outer space. The most common form is the ballistic missile-shaped multistage ...
consisting of an
orbiter A spacecraft is a vehicle that is designed to fly and operate in outer space. Spacecraft are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, ...
, a lander and a
rover Rover may refer to: People Name * Constance Rover (1910–2005), English historian * Jolanda de Rover (born 1963), Dutch swimmer * Rover Thomas (c. 1920–1998), Indigenous Australian artist Stage name * Rover (musician), French singer-songw ...
. The lander was scheduled to touch down on the lunar surface on 6 September 2019 to deploy the ''Pragyan'' rover. The lander lost contact with mission control, deviated from its intended trajectory while attempting to land near the lunar south pole, and crashed. The lunar south pole region holds particular interest for scientific exploration. Studies show large amounts of ice there. The ice could contain solid-state compounds that would normally melt under warmer conditions elsewhere on the Moon—compounds which could provide insight into lunar, Earth, and
Solar System The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Sola ...
history. Mountains and craters create unpredictable lighting that protect the ice from melting, but they also make landing there a challenging undertaking for scientific probes. For future crewed missions and outposts, the ice could also be a source of oxygen, of drinking water as well as of fuel due to its hydrogen content. The European Space Tracking network (ESTRACK), operated by the
European Space Agency The European Space Agency (ESA) is a 23-member International organization, international organization devoted to space exploration. With its headquarters in Paris and a staff of around 2,547 people globally as of 2023, ESA was founded in 1975 ...
(ESA), and
Deep Space Network The NASA Deep Space Network (DSN) is a worldwide Telecommunications network, network of spacecraft communication ground segment facilities, located in the United States (California), Spain (Madrid), and Australia (Canberra), that supports NASA' ...
operated by Jet Propulsion Laboratory (JPL) of
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
are supporting the mission. Under a new cross-support arrangement, ESA tracking support could be provided for upcoming ISRO missions such as those of India's first human spaceflight programme,
Gaganyaan Gaganyaan (,, from Sanskrit: , "celestial" and , "craft, vehicle") is an Indian List of crewed spacecraft, crewed orbital spacecraft intended to be the formative spacecraft of the Indian Human Spaceflight Programme. The spacecraft is being des ...
, and the
Aditya-L1 Aditya-L1 (Sanskrit: 'Sun', L1 ' Lagrange Point 1') is a coronagraphy spacecraft for studying the solar atmosphere, designed and developed by the Indian Space Research Organisation (ISRO) and various other Indian Space Research Institutes. ...
solar research mission. In return, future ESA missions will receive similar support from ISRO's own tracking stations. For the first time on the lunar surface, a laser beam from NASA's
Lunar Reconnaissance Orbiter The Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft currently orbiting the Moon in an eccentric Polar orbit, polar mapping orbit. Data collected by LRO have been described as essential for planning NASA's future human and robotic ...
was broadcast on 12 December 2023, and it was reflected back by a tiny NASA
retroreflector A retroreflector (sometimes called a retroflector or cataphote) is a device or surface that reflects light or other radiation back to its source with minimum scattering. This works at a wide range of angle of incidence (optics), angle of incidenc ...
on board the Vikram lander. The purpose of the experiment was to determine the retroreflector's surface location from the moon's orbit. The Chandrayaan-3 lander's
Laser Retroreflector Array A retroreflector (sometimes called a retroflector or cataphote) is a device or surface that reflects light or other radiation back to its source with minimum scattering. This works at a wide range of angle of incidence, unlike a planar mirror, w ...
(LRA) instrument began acting as a location marker close to the lunar south pole. Through multinational cooperation, the LRA was housed on the Vikram lander. On a hemispherical support framework, it consists of eight corner-cube retroreflectors. This array enables any orbiting spacecraft equipped with appropriate instruments to use lasers ranging from different directions. The 20 gram passive optical instrument is intended to survive for several decades on the lunar surface.


Objectives

ISRO's mission objectives for the Chandrayaan-3 mission are: # Engineering and implementing a lander to land safely and softly on the surface of the Moon. # Observing and demonstrating the rover's driving capabilities on the Moon. # Conducting and observing experiments on the materials available on the lunar surface to better understand the composition of the Moon.


Spacecraft


Design

Chandrayaan-3 comprises three main components: a propulsion module, lander module, and rover. File:LVM3 M4, Chandrayaan-3 - Render of Encapsulated Payload Fairing with Chandrayaan-3 composite stack.png, Chandrayaan-3 encapsulated within
LVM3 The Launch Vehicle Mark-3 or LVM3 (previously referred as the Geosynchronous Satellite Launch Vehicle Mark III or GSLV Mk III) is a Multistage rocket, three-stage medium-lift launch vehicle developed by the ISRO, Indian Space Research Organisati ...
's payload fairing File:Chandrayaan-3 Integrated Module - Views.webp, Chandrayaan-3 integrated components


Propulsion module

The propulsion module carried the lander and rover configuration to a lunar orbit. It was a box-like structure with a large solar panel mounted on one side and a cylindrical mounting structure for the lander (the Intermodular Adapter Cone) on top. A few months after the conclusion of the lander portion of the mission, ISRO officials said that the propulsion module was equipped with two radioisotope heating units (RHU), designed and developed by BARC (Bhabha Atomic Research Centre). RHUs keep spacecraft at their operational temperature using the decay of
radioactive material A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess numbers of either neutrons or protons, giving it excess nuclear energy, and making it unstable. This excess energy can be used in one of three ...
, to generate electricity to power heaters. Chandrayaan-3 project director P Veeramuthuvel said ISRO may use nuclear resources to maintain instruments in future rovers. ISRO officials later said the RHUs could not be installed on Chandrayaan-3's ''Vikram'' lander and ''Pragyan'' rover because it would have increased their mass. This reduced their maximum lifespan to 14
Earth days ''Earth Days'' is a 2009 documentary film about the history of the environmental movement in the United States, directed by Robert Stone (director), Robert Stone and distributed by Zeitgeist Films in theaters. ''Earth Days'' premiered at the 2009 ...
, or 1
lunar day A lunar day is the time it takes for Earth's Moon to complete on its axis one synodic rotation, meaning with respect to the Sun. Informally, a lunar day and a lunar night is each approximately 14 Earth days. The formal lunar day is therefore t ...
. On 4 December 2023, ISRO reported that the propulsion module was reinserted into an orbit around the Earth. The primary objective of the reinsertion was to allow
Earth observation Earth observation (EO) is the gathering of information about the physical, chemical, and biosphere, biological systems of the planet Earth. It can be performed via remote sensing, remote-sensing technologies (Earth observation satellites) or throu ...
s by
spectral ''Spectral'' is a 2016 Hungarian-American military science fiction action film co-written and directed by Nic Mathieu. Written with Ian Fried & George Nolfi, the film stars James Badge Dale as DARPA research scientist Mark Clyne, with Max Marti ...
and
polarimetric Polarimetry is the measurement and interpretation of the polarization of transverse waves, most notably electromagnetic waves, such as radio or light waves. Typically polarimetry is done on electromagnetic waves that have traveled through or hav ...
instruments. It remains in operation in a High Earth Orbit. File:Chandrayaan-3 Propulsion Module.webp, Propulsion module


''Vikram'' lander

The '' Vikram'' lander was responsible for the soft landing on the Moon. It is also box-shaped, with four landing legs and four landing thrusters capable of producing 800
newtons The newton (symbol: N) is the unit of force in the International System of Units (SI). Expressed in terms of SI base units, it is 1 kg⋅m/s2, the force that accelerates a mass of one kilogram at one metre per second squared. The unit i ...
of thrust each. It carried the rover and had various scientific instruments to perform on-site analysis. The lander has four variable-thrust engines with
slew rate In electronics and electromagnetics, slew rate is defined as the change of voltage or current, or any other electrical or electromagnetic quantity, per unit of time. Expressed in SI units, the unit of measurement is given as the change per seco ...
changing capabilities, unlike Chandrayaan-2's lander, which had five, with the fifth one being centrally mounted and capable only of fixed thrust. One of the main reasons for Chandrayaan-2's landing failure was
altitude Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum (geodesy), datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometr ...
increase during the camera coasting phase. This was removed by allowing the lander to control altitude and thrust during all phases of descent. Altitude correction rate was increased from Chandrayaan-2's 10°/s to 25°/s with Chandrayaan-3. Additionally, the Chandrayaan-3 lander is equipped with a laser Doppler velocimeter (LDV) to allow measuring altitude in three directions. The impact legs were made stronger compared to Chandrayaan-2 and instrumentation redundancy was improved. It targeted a more precise landing region based on images provided by the Orbiter High-Resolution Camera (OHRC) onboard Chandrayaan-2's orbiter. ISRO improved the structural rigidity, increased
polling Poll, polled, or polling may refer to: Forms of voting and counting * Poll, a formal election ** Election verification exit poll, a survey taken to verify election counts ** Polling, voting to make decisions or determine opinions ** Polling pla ...
in instruments, increased data frequency and transmission, and added additional multiple contingency systems to improve lander survivability in the event of failure during descent and landing. File:Chandrayaan-3 Lander.webp, Lander


Rover pragyan

The '' Pragyan'' rover is a six-wheeled vehicle with a mass of . It is in size. The rover is expected to take multiple measurements to support research into the composition of the lunar surface, the presence of water ice in the lunar soil, the history of lunar impacts, and the evolution of the Moon's atmosphere. File:Chandrayaan-3 Pragyan rover.png, ''Pragyan'' rover


Payloads


On lander

* Chandra's Surface Thermophysical Experiment (ChaSTE) will measure the
thermal conductivity The thermal conductivity of a material is a measure of its ability to heat conduction, conduct heat. It is commonly denoted by k, \lambda, or \kappa and is measured in W·m−1·K−1. Heat transfer occurs at a lower rate in materials of low ...
and temperature of the lunar surface. * Instrument for Lunar Seismic Activity (ILSA) will measure the
seismicity Seismicity is a measure encompassing earthquake occurrences, mechanisms, and magnitude at a given geographical location. As such, it summarizes a region's seismic activity. The term was coined by Beno Gutenberg and Charles Francis Richter in 194 ...
around the landing site. * Radio Anatomy of Moon Bound Hypersensitive Ionosphere and Atmosphere—Langmuir Probe (RAMBHA-LP) will estimate the near-surface plasma density over time. *
Laser Retroreflector Array A retroreflector (sometimes called a retroflector or cataphote) is a device or surface that reflects light or other radiation back to its source with minimum scattering. This works at a wide range of angle of incidence, unlike a planar mirror, w ...
(LRA) supplied by
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
's
Goddard Space Flight Center The Goddard Space Flight Center (GSFC) is a major NASA space research laboratory located approximately northeast of Washington, D.C., in Greenbelt, Maryland, United States. Established on May 1, 1959, as NASA's first space flight center, GSFC ...
serving as a
fiducial marker A fiducial marker or fiducial is an object placed in the field of view of an image for use as a point of reference or a measure. It may be either something placed into or on the imaging subject, or a mark or set of marks in the reticle of an opt ...
on the moon. File:ChaSTE payload.png, Chandra's Surface Thermophysical Experiment (ChaSTE) File:ILSA payload.png, Instrument for Lunar Seismic Activity (ILSA) File:Rambha-payload.png, Radio Anatomy of Moon Bound Hypersensitive Ionosphere and Atmosphere—Langmuir Probe (RAMBHA-LP)


On rover

* An
alpha particle X-ray spectrometer :''APXS is also an abbreviation for APache eXtenSion tool, an extension for Apache web servers.'' An alpha particle X-ray spectrometer (APXS) is a spectrometer that analyses the chemical element composition of a sample from scattered alpha parti ...
(APXS) will derive the chemical composition and infer the
mineralogical Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the proces ...
composition of the lunar surface. *
Laser-induced breakdown spectroscopy Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites samples. The formation of ...
(LIBS) will determine the elemental composition ( Mg, Al, Si, K, Ca, Ti, Fe) of lunar soil and rocks around the lunar landing site. File:APXS payload.png,
Alpha Particle X-Ray Spectrometer :''APXS is also an abbreviation for APache eXtenSion tool, an extension for Apache web servers.'' An alpha particle X-ray spectrometer (APXS) is a spectrometer that analyses the chemical element composition of a sample from scattered alpha parti ...
(APXS) File:LIBS payload.png, Laser-Induced Breakdown Spectroscope (LIBS)


On the propulsion module

* Spectro-polarimetry of Habitable Planet Earth (SHAPE) will study
spectral ''Spectral'' is a 2016 Hungarian-American military science fiction action film co-written and directed by Nic Mathieu. Written with Ian Fried & George Nolfi, the film stars James Badge Dale as DARPA research scientist Mark Clyne, with Max Marti ...
and
polarimetric Polarimetry is the measurement and interpretation of the polarization of transverse waves, most notably electromagnetic waves, such as radio or light waves. Typically polarimetry is done on electromagnetic waves that have traveled through or hav ...
measurements of Earth from the lunar orbit in the
near-infrared Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those of ...
radiation (NIR)
wavelength In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves ...
range (1–1.7 μm). Findings of SHAPE might aid in future
exoplanet An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first det ...
research and search for
extraterrestrial life Extraterrestrial life, or alien life (colloquially, aliens), is life that originates from another world rather than on Earth. No extraterrestrial life has yet been scientifically conclusively detected. Such life might range from simple forms ...
. File:SHAPE payload.png, Spectro-polarimetry of Habitable Planet Earth (SHAPE)


Mission profile


Launch

Chandrayaan-3 was launched aboard an
LVM3 The Launch Vehicle Mark-3 or LVM3 (previously referred as the Geosynchronous Satellite Launch Vehicle Mark III or GSLV Mk III) is a Multistage rocket, three-stage medium-lift launch vehicle developed by the ISRO, Indian Space Research Organisati ...
-M4 rocket on 14 July 2023, at 09:05 UTC from
Satish Dhawan Space Centre Satish Dhawan Space Centre – SDSC (formerly Sriharikota Range – SHAR) is the primary spaceport of the Indian Space Research Organisation (ISRO), located in Sriharikota, Tirupati district, Andhra Pradesh. The spaceport is located on an isl ...
Second Launch Pad Satish Dhawan Space Centre – SDSC (formerly Sriharikota Range – SHAR) is the primary spaceport of the Indian Space Research Organisation (ISRO), located in Sriharikota, Tirupati district, Andhra Pradesh. The spaceport is located on an isla ...
in
Sriharikota Sriharikota () is a barrier island off the Bay of Bengal coast located in the Shar Project settlement of Tirupati district in Andhra Pradesh, India. It houses the Satish Dhawan Space Centre, one of the two satellite launch centres in India (the ...
,
Andhra Pradesh Andhra Pradesh (ISO 15919, ISO: , , AP) is a States and union territories of India, state on the East Coast of India, east coast of southern India. It is the List of states and union territories of India by area, seventh-largest state and th ...
, India, entering an Earth
parking orbit A parking orbit is a temporary orbit used during the launch of a spacecraft. A launch vehicle follows a trajectory to the parking orbit, then coasts for a while, then engines fire again to enter the final desired trajectory. An alternative trajec ...
with a perigee of and an apogee of . On 15 November 2023, the Cryogenic Upper Stage ( C25) of the rocket (
NORAD North American Aerospace Defense Command (NORAD ; , CDAAN), known until March 1981 as the North American Air Defense Command, is a combined organization of the United States and Canada that provides aerospace warning, air sovereignty, and pr ...
ID: 57321) made an uncontrolled re-entry into the Earth's atmosphere around 9:12 UTC. The impact point is predicted over the
North Pacific Ocean North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' ...
and the final ground track did not pass over India.


Orbit

After a series of Earth bound manoeuvres that placed Chandrayaan-3 in a
trans-lunar injection A trans-lunar injection (TLI) is a propulsive maneuver, which is used to send a spacecraft to the Moon. Typical lunar transfer trajectories approximate Hohmann transfers, although low-energy transfers have also been used in some cases, as with ...
orbit, ISRO performed a lunar-orbit insertion (LOI) on 5 August, successfully placing the Chandrayaan-3 spacecraft into an orbit around the Moon. The LOI operation was carried out from the ISRO Telemetry, Tracking, and Command Network (ISTRAC) in
Bengaluru Bengaluru, also known as Bangalore (List of renamed places in India#Karnataka, its official name until 1 November 2014), is the Capital city, capital and largest city of the southern States and union territories of India, Indian state of Kar ...
. On 17 August, the Vikram lander separated from the propulsion module to begin landing operations.


Landing

File:Chandrayaan 3 Vikram hop (53163360576).webm, Vikram lander shows it doing a short hop on the lunar surface. File:Chandrayaan-3 Pragyan rapid deployment of the ramp and rover solar panel.webm, Rapid deployment of the ramp and rover solar panel File:Chandrayaan 3 Pragyan rampdown (53163897565).webm, Pragyan rover rampdown File:Moon as captured by the Lander Position Detection Camera (LPDC) aboard Chandrayaan-3 lander on 15 August 2023.webm, The Moon photographed by the Lander Position Detection Camera (LPDC) aboard Chandrayaan-3 lander on 15 August 2023 File:View from the Lander Imager Camera-1 (LI-1) on 17 August 2023 just after the separation of the Chandrayaan-3 Lander Module from the Propulsion Module.webm, View from the Lander Imager Camera-1 (LI-1) on 17 August 2023 just after the separation of the Chandrayaan-3 Lander Module from the Propulsion Module File:Chandrayaan-3 – Mission Profile.webp, Chandrayaan-3 orbital manoeuvre File:Image of Chandrayaan-3 Lander captured by OHRC camera aboard Chandrayaan-2 Orbiter.webp, Image of Chandrayaan-3 Lander as captured by OHRC camera aboard Chandrayaan-2 Orbiter File:Chandrayaan-3 – Image of Vikram lander on lunar surface taken by Pragyan rover navcam at 1104 IST, 30 August 2023 from 15 meters away (without text).webp, Chandrayaan-3 Lander on the Moon imaged by rover Pragyan 15 meters away On 23 August 2023, as the lander approached the low point of its orbit, its four engines fired as a braking manoeuvre at above the Moon's surface. After 11.5 minutes, the lander was 7.2 km (4.5 miles) above the surface; it maintained this altitude for about 10 seconds, then stabilized itself using eight smaller thrusters and rotated from a horizontal to a vertical position while continuing its descent. It then used two of its four engines to slow its descent to roughly ; it hovered there for about 30 seconds and located an optimal landing spot before continuing downward and touching down at 12:33
UTC Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communica ...
.


Surface operations

On 3 September, the rover was put into sleep mode after it had completed all of its assignments. Its batteries were charged and receiver left on, according to ISRO, in preparation for the impending lunar night. "The rover's payloads are turned off and the data it collected has been transmitted to Earth via the lander", the statement said. Chandrayaan-3's lander and rover were expected to operate only for one lunar daylight period, or 14 Earth days, and the on-board electronics were not designed to withstand the nighttime temperatures on the Moon. On 22 September, the lander and rover missed their wake-up calls, and by 28 September neither had responded, diminishing hopes for further surface operations. Hop experiment ''Vikram'' fired its engines for a brief 'hop' on the lunar surface on 3 September, ascending off the lunar surface and translating a similar distance laterally across the surface. The test demonstrated capabilities to be used in potential future sample return missions. The instruments and rover deployment ramp were retracted for the hop and redeployed afterwards.


Propulsion module reinserted to orbit around Earth

The propulsion module of Chandrayaan-3 was moved out of lunar orbit to an orbit around Earth. Although the plan was to operate SHAPE for three months in lunar orbit, it was decided to utilise over 100kg of fuel left in the PM after one month of operation to derive additional information for future lunar missions, and determine strategies for sample return missions and gravity-assisted flyby missions. ISRO's flight dynamics team had developed software to be validated through these return manoeuvres. The first lunar bound apogee raising manoeuvre was executed on 9 October 2023 raising the apogee from 150 km to 5112 km and orbital period from 2.1 hours to 7.2 hours. The
Trans-Earth Injection A trans-Earth injection (TEI) is a propulsion maneuver used to set a spacecraft on a trajectory which will intersect the Earth's sphere of influence, usually putting the spacecraft on a free return trajectory. The maneuver is performed by a r ...
was done on 13 October 2023 with a targeted orbit of ~380,000 x 180,000 km. This was followed by four lunar flyby's with the last one on 7 November 2023. The module exited lunar
SOI In Thailand, a ''soi'' ( ) is a side street that branches off of a major street (''thanon'', ). An alley is called a ''trok'' (). Overview Sois are usually numbered, and are referred to by the name of the major street and the number, as in "S ...
on 10 November 2023 and had the first perigee crossing on 22 November 2023 at an altitude of about 154,000 km. The propulsion module is currently orbiting Earth with a perigee and apogee altitude that vary during its trajectory and the predicted minimum perigee altitude is , with an orbital period of nearly 13 days with 27 degree inclination. The SHAPE payload is operated whenever Earth is in its field of view, as well during special events such as the 28 October 2023
solar eclipse A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season i ...
. The SHAPE payload operations are planned to continue further. The Propulsion module operated until 22 August 2024.


Mission life

* Propulsion module: Carries lander and rover to orbit, with operation of experimental payload for up to six months but lasted for more than an year. * Lander module: one lunar daylight period (14 Earth days). * Rover module: one lunar daylight period (14 Earth days).


Team

* ISRO chairman:
S. Somanath Dr. Sreedhara Panicker Somanath (born July 1963) is an Indian Aerospace engineering, aerospace engineer served as the Chairman of the Indian Space Research Organisation, chairman of the ISRO, Indian Space Research Organisation (ISRO). Under hi ...
* Mission director: S. Mohanakumar * Associate mission director: G. Narayanan * Project director: P. Veeramuthuvel * Associate project director:
Kalpana Kalahasti Kalpana Kalahasti (born 1974) is an Indian scientist and Electronics and Communication Engineer working in the Indian Space Research Organisation (ISRO). She currently serves as the Associate Project director of the Chandrayaan-3 mission. Kalpa ...
* Vehicle director: Biju C. Thomas


Funding

In December 2019, ISRO requested the initial funding of the project, amounting to , out of which would be for meeting expenditure towards machinery, equipment, and other capital expenditure, while the remaining was sought for operating expenditure. Amit Sharma, CEO of an ISRO vendor, said, "With local sourcing of equipment and design elements, we are able to reduce the price considerably." Confirming the existence of the project, ISRO's former chairman
K. Sivan Kailasavadivu Sivan (born 14 April 1957) is an Indian aerospace engineer who served as the secretary of the Department of Space and chairman of the Indian Space Research Organisation (ISRO) and Space Commission. He has previously served as th ...
stated that the estimated cost would be around .


Results

The
Associated Press The Associated Press (AP) is an American not-for-profit organization, not-for-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association, and produces news reports that are dist ...
, while commenting on the success of the mission, said, "The successful mission showcases India's rising standing as a technology and space powerhouse and dovetails with Prime Minister
Narendra Modi Narendra Damodardas Modi (born 17 September 1950) is an Indian politician who has served as the Prime Minister of India, prime minister of India since 2014. Modi was the chief minister of Gujarat from 2001 to 2014 and is the Member of Par ...
's desire to project an image of an ascendant country asserting its place among the global elite." About results on water existence, "There was no word on the outcome of the rover searches for signs of frozen water on the lunar surface (...)".


Temperature variation

ISRO also released data from the observations made by ChaSTE (Chandra's Surface Thermophysical Experiment), one of the four instruments present on the lander module. ChaSTE was designed to study the heat conductivity of the Moon's surface and measure the differences in temperatures at different points on and below the surface, with the overall objective of creating a thermal profile of the Moon. ISRO scientist BH Darukesha said the high range of temperature near the surface was "not expected".


Detection of sulfur

On 29 August, ISRO reported that the laser-induced breakdown spectroscope (LIBS) instrument on board the ''Pragyan'' rover has "unambiguously" confirmed the presence of
sulfur Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms ...
in the lunar surface near the south pole, through "first-ever in-situ measurements". The presence of sulfur on the Moon has been known before; however, it was detected for the first time at the south pole by the rover. Noah Petro, a project scientist at NASA, while speaking to the
BBC The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England. Originally established in 1922 as the British Broadcasting Company, it evolved into its current sta ...
, stated that while sulfur has been known to be in the lunar
regolith Regolith () is a blanket of unconsolidated, loose, heterogeneous superficial deposits covering solid rock. It includes dust, broken rocks, and other related materials and is present on Earth, the Moon, Mars, some asteroids, and other terrestria ...
from
Apollo program The Apollo program, also known as Project Apollo, was the United States human spaceflight program led by NASA, which Moon landing, landed the first humans on the Moon in 1969. Apollo followed Project Mercury that put the first Americans in sp ...
samples, he described ''Pragyan''s findings as a "tremendous accomplishment". Apart from sulfur, the rover also detected other elements including aluminium (Al), calcium (Ca), iron (Fe), chromium (Cr), titanium (Ti), manganese (Mn), silicon (Si), and oxygen (O). The agency said it is also searching for hydrogen (H).


Plasma measurement

On 31 August, ISRO released plasma density data from the RAMBHA Instrument aboard the ''Vikram'' lander. Initial assessments reported relatively low plasma densities above the lunar surface varying from 5 to 30 million electrons per m3. The evaluation pertains to early stages of the
lunar day A lunar day is the time it takes for Earth's Moon to complete on its axis one synodic rotation, meaning with respect to the Sun. Informally, a lunar day and a lunar night is each approximately 14 Earth days. The formal lunar day is therefore t ...
. The probe aims to explore the changes in the near-surface plasma environment throughout the duration of the lunar day.


Seismic measurements

On the same day, ISRO released data from the ILSA payload on the lander, providing vibration measurements of the rover movement on 25 August, and a presumed natural event on 26 August. The cause of the latter event is a subject of investigation, it is suspected to be a moonquake.


In-situ temperature measurements

The ChaSTE probe penetrated into the lunar soil to carryout measurements for the entire duration of the mission. ChaSTE in-situ measurements were carried out for a significant fraction of a lunar day (~8 AM - 4 PM Local time at the Moon) i.e. approximately 10 Earth days (i.e. from 24 Aug. - 2 Sept. 2023) at an interval of about a second. In research published in March 2025, ChaSTE observations during the mission indicated that the lunar surface temperatures show a significant spatial variability at metre scales at high latitudes, unlike at the equatorial regions. These effects become prominent as we move towards poles, an important aspect that should be considered for future exploration. .The peak surface temperature at landing site was measured to be 355 K (± 0.5 K), a temperature relatively higher than ~330 K (±3K), predicted by earlier observations. This unexpected higher temperature is due to penetration of ChaSTE on the Sun-ward (equator-ward) facing surface with a slope of ~6o. Lunar surface temperature measured from a flat surface using an independent sensor, about a metre away from ChaSTE location, was found to be ~332K (±1K), which is consistent with orbiter based remote sensing observation (~330 K). By understanding how well the surface layer conducts heat and how much heat it can hold, as done by ChaSTE, scientists can figure out how heat moves around, predict temperatures below the surface, and see how sunlight interacts with the Moon. This would also help engineers to find subsurface locations with benign thermal environment and design safe places to plan future trips and live on the Moon.


Domestic reactions

Chandrayaan-3's landing live stream on ISRO's official
YouTube YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim who were three former employees of PayPal. Headquartered in ...
channel received eight million concurrent viewers, which is the highest in YouTube's history for a live video. Congratulating the ISRO team behind the successful Chandrayaan-3 mission at ISRO Telemetry, Tracking and Command Network in Bengaluru, Indian Prime Minister
Narendra Modi Narendra Damodardas Modi (born 17 September 1950) is an Indian politician who has served as the Prime Minister of India, prime minister of India since 2014. Modi was the chief minister of Gujarat from 2001 to 2014 and is the Member of Par ...
announced that the touchdown point of the ''Vikram'' lander would henceforth be known as
Statio Shiv Shakti ''Shiv Shakti Point'' is the landing site of Chandrayaan-3, the third lunar mission of Indian Space Research Organisation (ISRO). The mission's lander ''Vikram'' and rover '' Pragyan'' landed 600 km from the south pole of the Moon on 23 August 20 ...
. He further declared 23 August, the day the ''Vikram'' lander landed on the Moon, as National Space Day. ISRO chief
S. Somanath Dr. Sreedhara Panicker Somanath (born July 1963) is an Indian Aerospace engineering, aerospace engineer served as the Chairman of the Indian Space Research Organisation, chairman of the ISRO, Indian Space Research Organisation (ISRO). Under hi ...
proclaimed "India is on the Moon" after the successful touchdown. "We learnt a lot from our failure and corrected it. It's now 14 days of work and we have to conduct experiments," he told
India Today ''India Today'' is a weekly Indian English-language news magazine published by Living Media, Living Media India Limited. It is the most widely circulated magazine in India, with a readership of close to 8 million. In 2014, ''India Today'' laun ...
. P Veeramuthuvel, the project director of the mission said, "It's a great moment of happiness. On behalf of the team it gives me immense satisfaction on achieving this goal as the Project Director of the mission. The entire mission operations right from launch till landing happened flawlessly as per the timeline". S. Mohana Kumar, the mission director, said that Chandrayaan-3 was a "team effort". Meanwhile, former ISRO chief K Sivan, under whose tenure the
Chandrayaan-2 Chandrayaan-2 (; from Sanskrit: , "Moon" and , "craft, vehicle") is the second lunar exploration mission developed by the Indian Space Research Organisation (ISRO) after Chandrayaan-1. It consists of a lunar orbiter, the ''Vikram'' lunar l ...
was launched said, "We are really excited to see this grand success. For this, we have been waiting for the last four years. This success is sweet news for us and for the entire nation."
Rahul Gandhi Rahul Rajiv Gandhi (; born 19 June 1970) is an Indian politician. A member of the Indian National Congress (INC), he is currently serving as the 12th leader of the Opposition in Lok Sabha and as the member of the Lok Sabha for Rae Bareli Lok ...
, the leader of congress, also celebrated Chandrayaan-3's success, calling it a result of "tremendous ingenuity and hard work" by the country's scientific community. "Since 1962, India's space program has continued to scale new heights and inspire generations of young dreamers," he posted on X.
DY Chandrachud Dhananjaya Yeshwant Chandrachud (born 11 November 1959), often referred as DY Chandrachud, is an Indian jurist, who served as the List of chief justices of India, 50th Chief Justice of India from 9 November 2022 to 10 November 2024. He was Judge ...
, the
chief justice of India The chief justice of India (CJI) is the chief judge of the Supreme Court of India and the highest-ranking officer of the Indian judiciary. The Constitution of India grants power to the President of India to appoint, as recommended by the outg ...
hailed the landing as "a milestone in the onward march of our nation" and congratulated the ISRO team.


International reactions

Josef Aschbacher, director general of the
European Space Agency The European Space Agency (ESA) is a 23-member International organization, international organization devoted to space exploration. With its headquarters in Paris and a staff of around 2,547 people globally as of 2023, ESA was founded in 1975 ...
, said: "Incredible! Congratulations to ISRO, Chandrayaan-3, and to all the people of India!! What a way to demonstrate new technologies AND achieve India's first soft landing on another celestial body. Well done, I am thoroughly impressed."
Abdulla Shahid Abdulla Shahid, (; born 26 May 1962) is a Maldivian politician who served as President of the United Nations General Assembly, President of the 76th United Nations General Assembly between 2021 and 2022 and is the current president of the Maldi ...
, the foreign minister of
Maldives The Maldives, officially the Republic of Maldives, and historically known as the Maldive Islands, is an Archipelagic state, archipelagic country in South Asia located in the Indian Ocean. The Maldives is southwest of Sri Lanka and India, abou ...
, wrote "As a South Asian nation, and neighbour, we are proud of the successful landing of Chandrayaan 3 near the moon's south pole. This is a success for all of humanity! Opening new avenues for new areas of exploration."
Bill Nelson Clarence William Nelson II (born September 29, 1942) is an American politician, attorney, and former astronaut who served from 2001 to 2019 as a United States Senate, United States senator from Florida and from 2021 to 2025 as the Administrator ...
, the administrator of
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
wrote "Congratulations ISRO on your successful Chandrayaan-3 lunar South Pole landing and congratulations to India on being the 4th country to successfully soft-land a spacecraft on the Moon. We're glad to be your partner on this mission".
Cyril Ramaphosa Matamela Cyril Ramaphosa (born 17 November 1952) is a South African businessman and politician serving as the 5th and current President of South Africa since 2018. A former Anti-Apartheid Movement, anti-apartheid activist and trade union leade ...
, the president of
South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...
said "This for us, as the BRICS family, is a momentous occasion and we rejoice with you. We join you in the joy of this great achievement." The
Kremlin The Moscow Kremlin (also the Kremlin) is a fortified complex in Moscow, Russia. Located in the centre of the country's capital city, the Moscow Kremlin (fortification), Kremlin comprises five palaces, four cathedrals, and the enclosing Mosco ...
quoted Russian president
Vladimir Putin Vladimir Vladimirovich Putin (born 7 October 1952) is a Russian politician and former intelligence officer who has served as President of Russia since 2012, having previously served from 2000 to 2008. Putin also served as Prime Minister of Ru ...
's message to Indian president Droupadi Murmu and Modi, "Please, accept my heartfelt congratulations on the occasion of the successful landing of the Indian space station Chandrayaan-3 on the Moon near its South Pole. This is a big step forward in space exploration and certainly a testament to the impressive progress made by India in the area of science and technology". Nepal prime minister
Pushpa Kamal Dahal Pushpa Kamal Dahal (; born Ghanashyam Dahal, 11 December 1954), alias ''Prachanda'' (, , "fierce"), is a Nepalese politician, currently serving as the Leader of the Opposition, since July 2024. He has served as the Prime Minister of Nepal o ...
said "I congratulate Prime Minister Shri Narendra Modi ji and ISRO team of India on successful landing of Chandrayan-3 in the surface of the moon today and unleashing of a historic achievement in science and space technology."


Awards

The Exploration Museum The Exploration Museum ( ) is dedicated to the history of human exploration, from the early explorers to the exploration of space. The museum is located in the center of Húsavík in North Iceland, from the Arctic Circle. The museum was founded ...
has bestowed upon ISRO the esteemed Leif Erikson Lunar Prize in honor of the space agency's resolute dedication and noteworthy advancements in lunar exploration in 2023. In recognition of its accomplishments with the historic Chandrayaan-3 mission in 2023, ISRO has been bestowed with the esteemed Aviation Week Laureates Award. Sripriya Ranganathan, Deputy Ambassador at the Indian Embassy in the US, accepted the award on behalf of ISRO. The Chandrayaan-3 mission team has raised the bar for space exploration, and for that reason, they have been awarded the prestigious 2024 John L. 'Jack' Swigert Jr. Award for Space Exploration. On 8 April 2024, at the opening ceremony of the annual Space Symposium in
Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
, India's Consul General D C Manjunath accepted the prize on behalf of the Indian Space Research Organization. The
International Astronautical Federation The International Astronautical Federation (IAF) is an international space advocacy organization based in Paris, and founded in 1951 as a non-governmental organization to establish a dialogue between scientists around the world and to lay t ...
has presented Chandrayaan-3 with the World Space Award. The award presentation is slated to take place on October 14 in
Milan Milan ( , , ; ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban area and the List of cities in Italy, second-most-populous city proper in Italy after Rome. The city proper has a population of nea ...
, during the 75th
International Astronautical Congress The International Astronautical Congress (IAC) is an annual meeting of the actors in the discipline of space science. It is hosted by one of the national society members of the International Astronautical Federation (IAF), with the support of ...
opening ceremony. According to the International Astronautical Federation, Chandrayaan-3 mission by ISRO exemplifies the synergy of scientific curiosity and cost-effective engineering.


See also

*
List of missions to the Moon Missions to the Moon have been numerous and include some of the earliest space missions, conducting exploration of the Moon since 1959. The first partially successful lunar mission was Luna 1 (January 1959), the first probe to leave Earth ...
* *
Aditya-L1 Aditya-L1 (Sanskrit: 'Sun', L1 ' Lagrange Point 1') is a coronagraphy spacecraft for studying the solar atmosphere, designed and developed by the Indian Space Research Organisation (ISRO) and various other Indian Space Research Institutes. ...
– Indian solar observation mission *
Gaganyaan Gaganyaan (,, from Sanskrit: , "celestial" and , "craft, vehicle") is an Indian List of crewed spacecraft, crewed orbital spacecraft intended to be the formative spacecraft of the Indian Human Spaceflight Programme. The spacecraft is being des ...
– Indian crewed spacecraft project * Indian Human Spaceflight Programme * Indian Martian Exploration Programme *
Venus Orbiter Mission The Venus Orbiter Mission (VOM), unofficially known as ''Shukrayaan'' (Sanskrit: 'Venus', 'Craft, Vehicle'), is a planned Indian Space Research Organisation (ISRO) mission to study the surface and atmosphere of Venus. Funds were released ...
– Indian Venus exploration mission


Notes


References


External links


Chandrayaan-3 ISRO official site
* Chandrayaan-3 Image Gallery

* Orbital and Lunar Surface operation videos

{{Authority control Missions to the Moon Lunar rovers Indian lunar exploration programme Space probes launched in 2023 Spacecraft launched by India in 2023 Spacecraft launched by LVM3 rockets ISRO space probes 2023 on the Moon Soft landings on the Moon Successful space missions