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51 Pegasi b, officially named Dimidium / d ɪ ˈ m ɪ d i ə m /, is an extrasolar planet approximately 50 light-years (15 parsecs) away in the constellation of Pegasus.It was the first exoplanet to be discovered orbiting a main-sequence star, [3] the Sun-like 51 Pegasi, and marked a breakthrough in astronomical research.
51 Pegasi b: 51 Pegasi: 1995 First convincing exoplanet discovered around a Sun-like star. [2] While the minimum mass of HD 114762 b was high enough (11 Jupiter-masses) that it could be a brown dwarf, 51 Peg b's minimum mass meant that it almost certainly was near the mass of Jupiter. First planet discovered via transit: OGLE-TR-56 b: OGLE-TR ...
51 Pegasi (abbreviated 51 Peg), formally named Helvetios / h ɛ l ˈ v iː ʃ i ə s /, [12] is a Sun-like star located 50.6 light-years (15.5 parsecs) from Earth in the constellation of Pegasus. It was the first main-sequence star found to have an exoplanet (designated 51 Pegasi b , officially named Dimidium) orbiting it.
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In 1995, astronomers using ground-based observatories discovered 51 Pegasi b, the first exoplanet orbiting a Sun-like star. [7] NASA launched the Kepler space telescope in 2009 to search for Earth-size exoplanets.
Together with Michel Mayor in 1995, he discovered 51 Pegasi b, the first extrasolar planet orbiting a Sun-like star, 51 Pegasi. [3] For this discovery, he shared the 2019 Nobel Prize in Physics with Mayor and Jim Peebles. [4] [5] In 2021, he was announced as the founding director of the Center for the Origin and Prevalence of Life at ETH Zurich ...
51 Pegasi b: 0.46 4.230785 0.0527 radial vel. 1995 50.45 1.12 5793 Proper name Dimidium. First exoplanet discovered orbiting a main sequence star. 55 Cancri b:
In July 1995, the pair's survey of 51 Pegasi affirmed that there was an exoplanet orbiting it, identified as 51 Pegasi b, which was later classified as a hot-Jupiter–type planet. This was the first exoplanet to be found orbiting a main-sequence star, as opposed to planets that orbited the remains of a star. [17]