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Beta Cancri B
Beta Cancri b is a gas giant exoplanet that orbits the K-type giant Beta Cancri. Its mass is 7.8 Jupiter masses, it takes 1.7 years to complete one orbit of its star, and is from its star, on a nearly circular orbit. Discovery First evidence for a planet around Beta Cancri was presented in 2008, when variations of the host star's radial velocity with a period of 673 days, but at that time an explanation to the radial velocity variations (such as a planet) wasn't presented. In 2014, Lee et al. found further evidence for the planet's existence, finding a different period of 605.2 days. After ruling out alternative explanations for the radial velocity variations, such as stellar variability, its existence could be confirmed. Beta Cancri b was discovered with doppler spectroscopy, also known as the radial velocity method, which consists on observing small variations in the star's spectrum, which are radial velocity variations and happen because the planet is able to gravitationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doppler Spectroscopy
Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. As of June 2025, over 1,100 known extrasolar planets (about 19.0% of the total) have been discovered using Doppler spectroscopy. History Otto Struve proposed in 1952 the use of powerful spectrographs to detect distant planets. He described how a very large planet, as large as Jupiter, for example, would cause its parent star to wobble slightly as the two objects orbit around their center of mass. He predicted that the small Doppler shifts to the light emitted by the star, caused by its continuously varying radial velocity, would be detectable by the most sensitive spectrographs as tiny redshifts and blueshifts in the star's emission. However, the technology of the time produced radial-veloc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancer (constellation)
Cancer is one of the twelve constellations of the zodiac and is located in the Northern celestial hemisphere. Its name is Latin for crab and it is commonly represented as one. Cancer is a medium-size constellation with an area of 506 square degrees and its stars are rather faint, its brightest star Beta Cancri having an apparent magnitude of 3.5. It contains ten stars with known exoplanet, planets, including 55 Cancri, which has five: one Super-Earth, super-Earth and four gas giants, one of which is in the habitable zone and as such has expected temperatures similar to Earth. At the (angular) heart of this sector of our celestial sphere is Beehive Cluster, Praesepe (Messier 44), one of the closest open clusters to Earth and a popular target for amateur astronomers. Characteristics Cancer is a medium-sized constellation that is bordered by Gemini (constellation), Gemini to the west, Lynx (constellation), Lynx to the north, Leo Minor to the northeast, Leo (constellation), Leo to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoplanets Discovered In 2014
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 detected in 1988, was confirmed in 2003. In 2016, it was recognized that the first possible evidence of an exoplanet had been noted in 1917. In collaboration with ground-based and other space-based observatories the James Webb Space Telescope (JWST) is expected to give more insight into exoplanet traits, such as their composition, environmental conditions, and potential for life. There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of planets near the star; thus, 85% of the exoplanets detected are inside the tidal locking zone. In several cases, multiple planets have been observed around a star. About 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extrasolar Planets Encyclopaedia
The Extrasolar Planets Encyclopaedia (also known as Encyclopaedia of exoplanetary systems and Catalogue of Exoplanets) is an astronomy website, founded in Paris, France at the Meudon Observatory by Jean Schneider in February 1995, which maintains a database of all the currently known and candidate extrasolar planets, with individual pages for each planet and a full list interactive catalog spreadsheet. The main catalogue comprises databases of all of the currently confirmed extrasolar planets as well as a database of unconfirmed planet detections. The databases are frequently updated with new data from peer-reviewed publications and conferences. In their respective pages, the planets are listed along with their basic properties, including the year of planet's discovery, mass, radius, orbital period, semi-major axis, eccentricity, inclination, longitude of periastron, time of periastron, maximum time variation, and time of transit, including all error range values. The ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Leonis
Gamma Leonis (γ Leonis, abbreviated Gamma Leo, γ Leo), also named Algieba , is a binary star system in the constellation of Leo, made up of two red giants. The primary star is orbited by one known exoplanet. Nomenclature ''γ Leonis'' ( Latinised to ''Gamma Leonis'') is the star's Bayer designation. The A and B components of the binary are often referred to as γ1 Leonis and γ2 Leonis, respectively. It also bore the traditional name ''Algieba'' or ''Al Gieba'', which originated from the Arabic ''الجبهة'' ''Al-Jabhah'', meaning 'the forehead' (despite this meaning, the star actually appears in the mane of Leo). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN, which included ''Algieba'' for this star. The star's traditional Latin name was ''Juba''. It is kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mu Leonis
Mu Leonis (μ Leonis, abbreviated Mu Leo, μ Leo), also named Rasalas , is a star in the constellation of Leo. The apparent visual magnitude of this star is 3.88, which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 0.02628 arc seconds as measured by the Hipparcos satellite, this system is from the Sun. In 2014, an exoplanet was discovered to be orbiting the star. Nomenclature ''μ Leonis'' ( Latinised to ''Mu Leonis'') is the star's Bayer designation. It bore the traditional names ''Rasalas'' and ''Alshemali'', both abbreviations of ''Ras al Asad al Shamaliyy''. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN approved the name ''Rasalas'' for this star on 12 September 2016 and it is now so included in the List of IAU-approved Star Names. Properties Mu Leonis is an evolved K-type red giant star with a stellar classificat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Ursae Minoris
Kochab , Bayer designation Beta Ursae Minoris (β Ursae Minoris, abbreviated β UMi, Beta UMi), is the brightest star in the bowl of the Little Dipper asterism (which is part of the constellation of Ursa Minor), and only slightly fainter than Polaris, the northern pole star and brightest star in Ursa Minor. Kochab is 16 degrees from Polaris and has an apparent visual magnitude of 2.08. The distance to this star from the Sun can be deduced from the parallax measurements made during the Hipparcos mission, yielding a value of . Amateur astronomers can use Kochab as a precise guide for equatorial mount alignment: The celestial north pole is located 38 arcminutes away from Polaris, very close to the line connecting Polaris with Kochab. Nomenclature ''β Ursae Minoris'' ( Latinised to ''Beta Ursae Minoris'') is the star's Bayer designation. It bore the traditional name ''Kochab'', which appeared in the Renaissance and has an uncertain meaning. It may be from o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamal
Hamal, pronounced , is a star in the northern zodiacal constellation of Aries. It has the Bayer designation Alpha Arietis, which is Latinized from α Arietis and abbreviated Alpha Ari or α Ari. This star is visible to the naked eye with an apparent visual magnitude of 2.0. Hamal is the brightest star in the constellation and, on average, the 50th-brightest star in the night sky. Based upon parallax measurements made with the ''Hipparcos'' astrometry satellite, Hamal is about from Earth. It is drifting closer to the Sun with a radial velocity of −14 km/s. This is an aging giant star that may host an orbiting planet with a mass greater than Jupiter. Nomenclature ''Alpha Arietis'' is the star's Bayer designation. It also bears the Flamsteed designation of 13 Arietis. The traditional name ''Hamal'' (also written ''Hemal'', ''Hamul'', ''Ras Hammel'') derives from the Arabic ''rās al-ħamal'' "head of the ram", in turn from the name for the constellation as a w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procyon
Procyon () is the brightest star in the constellation of Canis Minor and usually the list of brightest stars, eighth-brightest star in the night sky, with an apparent visual magnitude of 0.34. It has the Bayer designation α Canis Minoris, which is Latinisation of names, Latinized to Alpha Canis Minoris, and abbreviated α CMi or Alpha CMi, respectively. As determined by the European Space Agency ''Hipparcos'' astrometry satellite, this system lies at a distance of just , and is therefore one of Earth's List of nearest stars, nearest stellar neighbors. A binary star system, Procyon consists of a white-hued main-sequence star of spectral type F5 IV–V, designated component A, in orbit with a faint white dwarf companion of spectral type DQZ, named Procyon B. The pair orbit each other with a orbital period, period of 40.84 years and an orbital eccentricity, eccentricity of 0.4. Observation Procyon is usually the eighth-brightest star in the night sky, Culmina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Giant
A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses ()) in a late phase of stellar evolution. The stellar atmosphere, outer atmosphere is inflated and tenuous, making the radius large and the surface temperature around or lower. The appearance of the red giant is from yellow-white to reddish-orange, including the stellar classification, spectral types K and M, sometimes G, but also S-type star, class S stars and most carbon stars. Red giants vary in the way by which they generate energy: * most common red giants are stars on the red-giant branch (RGB) that are still stellar nucleosynthesis, fusing hydrogen into helium in a shell surrounding an inert helium core * red-clump stars in the cool half of the horizontal branch, fusing helium into carbon in their cores via the triple-alpha process * asymptotic-giant-branch (AGB) stars with a helium burning shell outside a degenerate carbon–oxygen core, and a hydrogen-burning shell just beyo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Stars In Cancer ...
This is the list of notable stars in the constellation Cancer. The 121 stars are sorted by decreasing brightness, beginning with Beta Cancri, the brightest star in Cancer. See also *Lists of stars by constellation References Bibliography * * * * * * * * {{DEFAULTSORT:List of stars in Cancer *List Cancer Cancer is a group of diseases involving Cell growth#Disorders, abnormal cell growth with the potential to Invasion (cancer), invade or Metastasis, spread to other parts of the body. These contrast with benign tumors, which do not spread. Po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Cancri
Beta Cancri (β Cancri, abbreviated Beta Cnc, β Cnc), also named Tarf , is the brightest star in the zodiacal constellation of Cancer. It has an apparent visual magnitude of +3.5 and an absolute magnitude of −1.2. Based on parallax measurements obtained during the Hipparcos mission, it is approximately 290 light-years distant from the Sun. An exoplanet, designated Beta Cancri b, is believed to be orbiting the star. Beta Cancri has a companion listed and together they are designated WDS J08165+0911. As the primary, Beta Cancri bears the designation WDS J08165+0911A. The companion is designated WDS J08165+0911B. Nomenclature ''β Cancri'' ( Latinised to ''Beta Cancri'') is the star's Bayer designation. WDS J08165+0911A is its designation in the Washington Double Star Catalog. The star bore the traditional name of ''Al Tarf'' (anglicized as ''Altarf''), which can be translated from the Arabic as "end" or "edge". In 2016, the IAU organized a Working Group o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
