What is TRAPPIST-1g?
'''TRAPPIST-1g''', also known as '''2MASS J23062928-0502285 g''' and '''K2-112 g''', is an [[Extrasolar planet|exoplanet]] orbiting around the [[Ultra-cool dwarf|ultra-cool dwarf star]] [[TRAPPIST-1]]. TRAPPIST-1 is 39 [[Light year|light years]] away from [[Earth]] in the constellation [[Aquarius (constellation)|Aquarius]]. The planet was one of four new exoplanets discovered orbiting the star using observations from the [[Spitzer Space Telescope]].<ref>{{Cite web|last=Cowing|first=Keith|date=2017-02-22|title=Temperate Earth-Sized Planets Found in Extraordinarily Rich Planetary System TRAPPIST-1|url=https://spaceref.com/science-and-exploration/temperate-earth-sized-planets-found-in-extraordinarily-rich-planetary-system-trappist-1/|access-date=2022-11-15|website=SpaceRef|language=en-US}}</ref> The exoplanet is within the [[habitable zone]] of its host star.<ref>{{Cite web|last=NASA|title=NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star|url=https://exoplanets.nasa.gov/news/1419/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around-single-star/|access-date=2022-11-15|website=Exoplanet Exploration: Planets Beyond our Solar System}}</ref> It was found by using the [[Methods of detecting exoplanets|transit method]], in which the dimming effect that a planet causes as it crosses in front of its star is measured. {{Infobox planet|extrasolarplanet=TRAPPIST-1g|image=File:TRAPPIST-1g artist impression 2018.png|discovered=2017|discovery_method=Transit|eccentricity=0.00208 (± 0.00058)|caption=Artist's impression of TRAPPIST-1g. (February 2018)|inclination=89.721 (± 0.23)|background=#f89fa|mean_diameter=14,398 km|mean_radius=5,797.6 km|single_temperature=−78.65 ± 2.70 °C}} TRAPPIST-1g is the second most distant known planet in its system. It is larger than Earth but less dense. This means that it likely has some form of water. == References == {{reflist}}{{TRAPPIST-1}} [[Category:Exoplanets]]