The year 2011 saw a number of significant events in spaceflight, including the

retirement Retirement is the withdrawal from one's position or occupation or from one's active working life. A person may also semi-retire by reducing work hours or workload. Many people choose to retire when they are elderly or incapable of doing their j ...

NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeedi ...

Space Shuttle The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program na ...

after its final flight in July 2011, and the launch of China's first

space station A space station is a spacecraft capable of supporting a human crew in orbit for an extended period of time, and is therefore a type of space habitat. It lacks major propulsion or landing systems. An orbital station or an orbital space station ...

module,

Tiangong-1 Tiangong-1 () was China's first prototype space station. It orbited Earth from September 2011 to April 2018, serving as both a crewed laboratory and an experimental testbed to demonstrate orbital rendezvous and docking capabilities during its ...

, in September. A total of 84 orbital launches were conducted over the course of the year, of which 78 were successful.

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eigh ...

, China and the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

conducted the majority of the year's orbital launches, with 35, 19 and 18 launches respectively; 2011 marked the first year that China conducted more successful launches than the United States. Seven crewed missions were launched into orbit during 2011, carrying a total of 28 astronauts to the

International Space Station The International Space Station (ISS) is the largest Modular design, modular space station currently in low Earth orbit. It is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos ( ...

. Additionally, the

Zenit-3F The Zenit-3F, Zenit-3SLBF or Zenit-2SB/Fregat is an expendable carrier rocket. It is a member of the Zenit family of rockets, which were designed by Yuzhnoye Design Bureau of Ukraine. Launches of Zenit-3SLBF rockets are conducted from Baikon ...

and Long March 2F/G

carrier rocket A launch vehicle or carrier rocket is a rocket designed to carry a payload (spacecraft or satellites) from the Earth's surface to outer space. Most launch vehicles operate from a launch pads, supported by a launch control center and system ...

s made their maiden flights in 2011, while the

Delta II Delta II was an expendable launch system, originally designed and built by McDonnell Douglas. Delta II was part of the Delta rocket family and entered service in 1989. Delta II vehicles included the Delta 6000, and the two later Delta 7000 v ...

Heavy made its last.

Overview of orbital spaceflight

A total of 84 orbital launches were attempted in 2011, with 78 being reported as successful; 80 launches reached orbit. 35 launches were conducted using Russian and former Soviet rockets, whilst China launched 19 rockets, and the United States launched 18. Europe conducted five launches, India and Japan launched three rockets each, and Iran conducted one launch.

Crewed launches

Seven crewed spaceflights – four

Soyuz Soyuz is a transliteration of the Cyrillic text Союз ( Russian and Ukrainian, 'Union'). It can refer to any union, such as a trade union (''profsoyuz'') or the Union of Soviet Socialist Republics (Сою́з Сове́тских Социали� ...

and three

missions – were launched in 2011, carrying a total of 28 astronauts and cosmonauts into orbit. At the beginning of the year, the

Expedition 26 Expedition 26 was the 26th long-duration mission to the International Space Station. The expedition's first three crew members – one US astronaut and two Russian cosmonauts – arrived at the station on board Soyuz TMA-01M on 10 October 2010. ...

crew was aboard the

(ISS). The first crewed flight of 2011 was

STS-133 STS-133 (ISS assembly flight ULF5) was the 133rd mission in NASA's Space Shuttle program; during the mission, Space Shuttle ''Discovery'' docked with the International Space Station. It was ''Discoverys 39th and final mission. The mission la ...

, the final flight of the Space Shuttle , which launched from the

Kennedy Space Center The John F. Kennedy Space Center (KSC, originally known as the NASA Launch Operations Center), located on Merritt Island, Florida, is one of the National Aeronautics and Space Administration's (NASA) ten field centers. Since December 196 ...

on 24 February. STS-133 carried '' Leonardo'', the final American pressurised module of the ISS, for installation. ''Discovery'' returned to Earth on 9 March. On 16 March,

Expedition 27 Expedition 27 was the 27th long-duration expedition to the International Space Station (ISS), starting on 16 March 2011. Expedition 27 saw numerous notable events, including the undocking of the Progress M-09M and Kounotori 2 spacecraft, the arr ...

began aboard the ISS with the departure of the

Soyuz TMA-01M Soyuz TMA-01M was a Soyuz flight that transported three members of the Expedition 25 crew to the International Space Station. TMA-01M was the 107th flight of a Soyuz spacecraft, and the first flight of the modernized TMA-M series. The spacecra ...

spacecraft, which had been docked since October 2010. On 4 April, Soyuz TMA-21 launched to the space station, delivering a further three crewmembers. On 16 May, Space Shuttle launched to the station on its final mission,

STS-134 STS-134 (ISS assembly flight ULF6) was the penultimate mission of NASA's Space Shuttle program and the 25th and last spaceflight of . This flight delivered the Alpha Magnetic Spectrometer and an ExPRESS Logistics Carrier to the International ...

, delivering and installing the

Alpha Magnetic Spectrometer The Alpha Magnetic Spectrometer (AMS-02) is a particle physics experiment module that is mounted on the International Space Station (ISS).Kristine Rainey (April 2, 2013)Alpha Magnetic Spectrometer (AMS): How It Works NASA. Retrieved June 2, 20 ...

, before returning to Earth on 1 June.

Expedition 28 Expedition 28 was the 28th long-duration expedition to the International Space Station, and began on 23 May 2011 with the departure of the members of Expedition 27. The first three members of Expedition 28 arrived on the ISS aboard the Soyuz TMA- ...

began aboard the ISS on 23 May with the departure of Soyuz TMA-20, which had been launched in December 2010, and landed in the early morning of 24 May. Three more crewmembers were launched to the space station aboard

Soyuz TMA-02M Soyuz TMA-02M was a space mission that transported three members of the Expedition 28 crew to the International Space Station. TMA-02M was the 110th flight of a Soyuz spacecraft (first launched 1967) and the second flight of the improved Soyu ...

on 7 June. The final Space Shuttle mission,

STS-135 STS-135 (ISS assembly flight ULF7) was the 135th and final mission of the American Space Shuttle program. It used the orbiter '' Atlantis'' and hardware originally processed for the STS-335 contingency mission, which was not flown. STS-135 l ...

, began on 8 July with the launch of , carrying supplies for the ISS aboard the '' Raffaello''

Multi-Purpose Logistics Module A Multi-Purpose Logistics Module (MPLM) is a large pressurized container that was used on Space Shuttle missions to transfer cargo to and from the International Space Station (ISS). Two MPLMs made a dozen trips in the Shuttle cargo bay and init ...

(MPLM). After resupplying the space station, ''Atlantis'' returned to Earth, landing at

Shuttle Landing Facility The Shuttle Landing Facility (SLF) also known as Launch and Landing Facility (LLF) is an airport located on Merritt Island in Brevard County, Florida, United States. It is a part of the Kennedy Space Center and was used by Space Shuttle for l ...

at 09:57 UTC on 21 July, and concluding thirty years of Space Shuttle operations. Two days before landing, ''Atlantis'' deployed PSSC-2, the last satellite to be launched from a Space Shuttle. On 29 September, China launched its first space station module,

, which was placed into orbit by a Long March 2F/G carrier rocket flying from the Jiuquan Satellite Launch Centre. Although no crewed missions to Tiangong-1 were conducted in 2011, the

uncrewed An uncrewed vehicle or unmanned vehicle is a vehicle without a person on board. Uncrewed vehicles can either be under telerobotic control—remote controlled or remote guided vehicles—or they can be autonomously controlled—autonomous vehic ...

Shenzhou 8 Shenzhou 8 () was an uncrewed flight of China's Shenzhou program, launched on 31 October 2011 UTC, or 1 November 2011 in China, by a Long March 2F rocket which lifted off from the Jiuquan Satellite Launch Center. The Shenzhou 8 spacecraft ...

spacecraft, which was launched on 31 October, docked twice with the module to test its systems in preparation for a successful 2012 crewed docking. ISS Expedition 28 ended, and

Expedition 29 Expedition 29 was the 29th long-duration expedition to the International Space Station (ISS). The expedition formally began on 16 September 2011, with the departure from the ISS of the Soyuz TMA-21 spacecraft. Astronauts Satoshi Furukawa, Mic ...

began, with the undocking of Soyuz TMA-21 on 16 September. The launch of

Soyuz TMA-22 Soyuz TMA-22 was a crewed spaceflight to the International Space Station (ISS). TMA-22 was the 111th flight of a Soyuz spacecraft, and transported three members of the Expedition 29 crew to the ISS. The spacecraft docked to the ISS on 16 November ...

did not take place until 14 November, having been delayed by reliability concerns surrounding the

rocket after an uncrewed launch failure in August. A week later, Soyuz TMA-02M undocked, beginning

Expedition 30 Expedition 30 was the 30th long-duration mission to the International Space Station (ISS). The expedition's first three crew members – Dan Burbank, Anton Shkaplerov and Anatoli Ivanishin – arrived on the ISS aboard Soyuz TMA-22 on 1 ...

, with the Soyuz spacecraft landing on 22 November. The final crewed launch of the year took place on 21 December, when

Soyuz TMA-03M Soyuz TMA-03M was a spaceflight to the International Space Station (ISS). It launched on 21 December 2011 from Site One at the Baikonur Cosmodrome, Kazakhstan, carrying three members of Expedition 30 to the ISS. TMA-03M was the 112th flight of ...

was launched to bring a further three crewmembers to the ISS. Ten

spacewalk Extravehicular activity (EVA) is any activity done by an astronaut in outer space outside a spacecraft. In the absence of a breathable Earthlike atmosphere, the astronaut is completely reliant on a space suit for environmental support. EVA inc ...

s were conducted in 2011, all of them by ISS or Space Shuttle astronauts. The final spacewalk by a Space Shuttle crew was conducted on 27 May, during the STS-134 mission.

Robotic exploration

Numerous scientific exploration missions were begun in 2011. In March 2011, the ''

MESSENGER ''MESSENGER'' was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for "Mercury Surface, Space Environment, Geoch ...

'' probe became the first artificial satellite of the planet Mercury. In July, the ''

Dawn Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's ho ...

'' spacecraft became the first artificial satellite of the

asteroid An asteroid is a minor planet of the Solar System#Inner solar system, inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic o ...

4 Vesta Vesta ( minor-planet designation: 4 Vesta) is one of the largest objects in the asteroid belt, with a mean diameter of . It was discovered by the German astronomer Heinrich Wilhelm Matthias Olbers on 29 March 1807 and is named after Vesta, th ...

. The

Mars Science Laboratory Mars Science Laboratory (MSL) is a robotic space probe mission to Mars launched by NASA on November 26, 2011, which successfully landed ''Curiosity'', a Mars rover, in Gale Crater on August 6, 2012. The overall objectives include investigati ...

– at the time, the largest

Mars rover A Mars rover is a motor vehicle designed to travel on the surface of Mars. Rovers have several advantages over stationary landers: they examine more territory, they can be directed to interesting features, they can place themselves in sunny p ...

ever constructed – was launched in November, conducting a successful landing on Mars in August 2012.

Launch failures

Six orbital launches failed in 2011, four of which failed to achieve orbit and the remaining two reached lower orbits than expected. The first failure occurred on 1 February, when a

Rokot Rokot (russian: Рокот meaning ''Rumble'' or ''Boom''), also transliterated Rockot, was a Russian space launch vehicle that was capable of launching a payload of into a Earth orbit with 63° inclination. It was based on the UR-100N (SS ...

with a

Briz-KM The Briz-K, Briz-KM and Briz-M (russian: Бриз-К, КM and M meaning ''Breeze-K, KM and M'') are Russian liquid-propellant rocket orbit insertion upper stages manufactured by Khrunichev State Research and Production Space Center and used on t ...

upper stage placed Kosmos 2470 into a useless orbit, from which it could not recover. The failure was later traced to a software problem on the Briz-KM. The next failure occurred on 4 March, when the payload fairing of a Taurus-XL failed to separate, resulting in the rocket being too heavy to reach orbit. The Glory climate research satellite was lost in the failure, along with the

KySat-1 KySat-1 was an American satellite which was to have been operated by Kentucky Space. Designed to operate for eighteen to twenty four months, it was lost in a launch failure in March 2011 after the Taurus launch vehicle carrying it failed to ac ...

Hermes Hermes (; grc-gre, Ἑρμῆς) is an Olympian deity in ancient Greek religion and mythology. Hermes is considered the herald of the gods. He is also considered the protector of human heralds, travellers, thieves, merchants, and orato ...

and Explorer-1 RIME/nowiki>

CubeSat A CubeSat is a class of miniaturized satellite based around a form factor consisting of cubes. CubeSats have a mass of no more than per unit, and often use commercial off-the-shelf (COTS) components for their electronics and structure. CubeSat ...

s. The previous Taurus-XL launch, carrying the

Orbiting Carbon Observatory The Orbiting Carbon Observatory (OCO) is a NASA satellite mission intended to provide global space-based observations of atmospheric carbon dioxide (). The original spacecraft was lost in a launch failure on 24 February 2009, when the payload ...

in February 2009, also failed due to the fairing not separating. No more launch failures occurred until mid-August when, over the space of a week, three consecutive orbital launches failed. On 17 August, a

Proton-M The Proton-M, (Протон-М) GRAU index 8K82M or , is an expendable Russian heavy-lift launch vehicle derived from the Soviet-developed Proton. It is built by Khrunichev, and launched from sites 81 and 200 at the Baikonur Cosmodrome i ...

Briz-M The Briz-K, Briz-KM and Briz-M (russian: Бриз-К, КM and M meaning ''Breeze-K, KM and M'') are Russian liquid-propellant rocket orbit insertion upper stages manufactured by Khrunichev State Research and Production Space Center and used on ...

launched from the

Baikonur Cosmodrome ''Baiqoñyr ğaryş ailağy'' rus, Космодром Байконур''Kosmodrom Baykonur'' , image = Baikonur Cosmodrome Soyuz launch pad.jpg , caption = The Baikonur Cosmodrome's " Gagarin's Start" Soyu ...

, carrying the

Ekspress-AM4 Ekspress-AM4 was a Russian communications satellite placed into the wrong orbit from a faulty Briz-M rocket stage. This satellite was to be part of the Ekspress series of geostationary communications satellites owned by Russian Satellite Co ...

communications satellite. In the morning of 18 August, the rocket's upper stage failed to conduct the fourth of five planned burns due to an attitude control system malfunction, leaving the spacecraft in a parking orbit. Later that same day, a

Long March 2C The Long March 2C (LM-2C), also known as the Chang Zheng 2C (CZ-2C), is a Chinese orbital launch vehicle, part of the Long March 2 rocket family. Developed and manufactured by the China Academy of Launch Vehicle Technology (CALT), the Long Ma ...

launched from Jiuquan carrying the Shijian XI-04 satellite. The second stage vernier engine's mounting suffered a structural failure, resulting in a loss of control, and the rocket failed to reach orbit. Finally, on 24 August, a

Soyuz-U The Soyuz-U launch vehicle was an improved version of the original Soyuz rocket. Soyuz-U was part of the R-7 family of rockets based on the R-7 Semyorka missile. Members of this rocket family were designed by the TsSKB design bureau and cons ...

carrying the

Progress M-12M Progress M-12M (russian: Прогресс М-12М, italic=yes), identified by NASA as Progress 44P, was an uncrewed Progress spacecraft that was lost in a launch failure on 24 August 2011, at the start of a mission to resupply the International ...

cargo spacecraft to the International Space Station suffered a third-stage engine failure and also failed to attain orbit. The final launch failure of 2011 occurred on 23 December, when a Soyuz-2-1b/

Fregat Fregat (russian: Фрегат, '' frigate'') is an upper stage developed by NPO Lavochkin in the 1990s, which is used in some Soyuz and Zenit launch vehicles, but is universal and can be used as a part of a medium and heavy class launch vehi ...

carrying the Meridian 5 satellite failed to achieve orbit due to a third-stage malfunction. Debris fell over

Novosibirsk Oblast Novosibirsk Oblast (russian: Новосиби́рская о́бласть, ''Novosibirskaya oblast'') is a federal subject of Russia (an oblast) located in southwestern Siberia. Its administrative and economic center is the city of Novosibi ...

, with one piece hitting a house; however, no casualties were reported. In November 2011, Russia's

Fobos-Grunt Fobos-Grunt or Phobos-Grunt (russian: link=no, Фобос-Грунт, where ''грунт'' refers to the ''ground'' in the narrow geological meaning of any type of soil or rock exposed on the surface) was an attempted Russian sample return mis ...

Martian Mars, the fourth planet from the Sun, has appeared as a setting in works of fiction since at least the mid-1600s. It became the most popular celestial object in fiction in the late 1800s as the Moon was evidently lifeless. At the time, the pre ...

sample return probe launched successfully, but experienced a malfunction post-launch and became stranded in orbit. The spacecraft, which was Russia's first attempt at an interplanetary mission since the 1996

Mars 96 Mars 96 (sometimes called Mars-8) was a failed Mars mission launched in 1996 to investigate Mars by the Russian Space Forces and not directly related to the Soviet Mars probe program of the same name. After failure of the second fourth-stage ...

mission, disintegrated over the Pacific Ocean on 15 January 2012."Phobos-Grunt: Failed Russian Mars Probe Falls to Earth"
ABC News. 15 January 2012. China's first Mars probe,

Yinghuo-1 Yinghuo-1 () was a Chinese Mars-exploration space probe, intended to be the first Chinese planetary space probe and the first Chinese spacecraft to orbit Mars. It was launched from Baikonur Cosmodrome, Kazakhstan, on 8 November 2011, along with ...

, which was being carried by the same rocket as Fobos-Grunt, was also lost in the incident.

Orbital launches

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