51 Pegasi b
the first planet found around a Sun-like star · Dimidium
51 light-years from Earth
Found in 1995 by Michel Mayor and Didier Queloz, who shared half of the 2019 Nobel Prize in Physics for it. A gas giant about half Jupiter's mass, it circles its star every 4.2 days, far closer than Mercury is to the Sun.
- orbit 4.2 days (sped up here) at 0.05 AU · 50.6 light-years
- seen from Earth it never crosses its star, so its width is unknown: drawn Jupiter-sized, colours a guess
- kind
- planet of another star
- size
- 140,000 km across
More planets of other stars
- 55 Cancri e lava world
- TRAPPIST-1e exoplanet
- HD 189733 b the deep blue planet
- K2-18 b sub-Neptune in the habitable zone
- HR 8799 b young giant planet
- Kepler-16b circumbinary planet
- Proxima b exoplanet
- KELT-9b the hottest planet known