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GJ 1214 b (sometimes Gliese 1214 b, formally named Enaiposha) is an exoplanet that orbits the star GJ 1214, and was discovered in December 2009. Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. As of 2017, GJ 1214 b is the most likely known candidate for being an ocean planet.
GJ 1214 b is a Neptune-like exoplanet that orbits a M-type star. Its mass is 8.41 Earths, it takes 1.6 days to complete one orbit of its star, and is 0.01505 AU from its star. Its discovery was announced in 2009.
May 10, 2023 · May 10, 2023. This artist’s concept depicts the planet GJ 1214 b, a “mini-Neptune” with what is likely a steamy, hazy atmosphere. A new study based on observations by NASA’s Webb telescope provides insight into this type of planet, the most common in the galaxy. Credit: NASA/JPL-Caltech/R. Hurt (IPAC)
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Discovered by the MEarth Project and investigated further by the HARPS spectrograph on ESO ’s 3.6-metre telescope at La Silla, GJ 1214 b was the second super-Earth exoplanet for which astronomers determined the mass and radius, giving vital clues about its structure. It was also the first super-Earth around which an atmosphere was found.
May 10, 2023 · NASA’s James Webb Space Telescope has observed a steamy, highly reflective mini-Neptune exoplanet, GJ 1214 b, using its Mid-Infrared Instrument (MIRI) to reveal details about its atmosphere. The watery atmosphere suggests that the planet formed farther from its star before spiraling inward, but more observations are needed to understand mini ...
Nov 17, 2021 · Two observation programs co-led by Bean and Kempton and scheduled for the first year of Webb operations will use Webb’s uniquely powerful capabilities to probe two sub-Neptune-sized planets: GJ 1214 b, the archetype sub-Neptune; and TOI-421 b, a more recent discovery.
Apr 22, 2024 · The current Japanese research team of astronomers and planetary scientists focused their efforts on investigating the atmospheric features of one super-Earth, GJ 1214 b, which is located 40 light years from Earth in the constellation Ophiuchus, northwest of the center of our Milky Way galaxy.
