Gliese 1214 b[3] (often shortened to GJ 1214 b) is an exoplanet that orbits the star Gliese 1214, and was discovered in December 2009. It is estimated that this planet was originally shaped ice planet far from its parent star. [14], Media related to GJ 1214 b at Wikimedia Commons, Coordinates: 17h 15m 18.94s, +4° 57′ 49.7″, "Open Exoplanet Catalogue – Gliese 1214 b", "Mass–radius relationships for solid exoplanets", "10 Real Planets That Are Stranger Than Science Fiction", "Release 13-383 – NASA's Hubble Sees Cloudy Super-Worlds With Chance for More Clouds", "Astronomers Find Super-Earth Using Amateur, Off-the-Shelf Technology", Astronomers Find World with Thick, Inhospitable Atmosphere and an Icy Heart. The scrutinized planet, which is known as GJ 1214b, is classified as a super-Earth type planet because its mass is intermediate between those of Earth and Neptune. [7] Some of the solid-phase water could be in the form of ice VII. It is thought GJ 1214b once orbited in the habitable zone around its host star, which may have allowed life to exist in its warm oceans. “A huge fraction of its mass is made up of water.” GJ 1214b was discovered in 2009 by the ground-based MEarth (pronounced “mirth”) Project, which is led by CfA’s David Charbonneau. Illustration of planet GJ 1214b 5. [7] It is possible to propose structures by assuming different compositions, guided by scenarios for the formation and evolution of the planet. [7] GJ 1214 b is also significant because its parent star is relatively near the Sun and because it transits (crosses in front of) that parent star, which allows the planet's atmosphere to be studied using spectroscopic methods. Its luminosity is only 0.33% that of the Sun. It appears to be rather hot and surrounded by a thick atmosphere, which makes it inhospitable for life as we know it on Earth. The mass of the planet can be inferred from sensitive observations of the parent star's radial velocity, measured through small shifts in stellar spectral lines due to the Doppler effect. “ A huge fraction of its mass is made up of water. [1][14], While very little is known about GJ 1214 b, there has been speculation as to its specific nature and composition. Because of the estimated old age of the planetary system and the calculated hydrodynamic escape rate of 9×105 kg s−1, scientists conclude that there has been a significant atmospheric loss during the lifetime of the planet and any current atmosphere cannot be primordial. the interior is assumed to be composed primarily of a water core surrounded by more water, proportions of the total mass consistent with the mass and radius are about 25% rock and 75% water, covered by a thick envelope of gases such as hydrogen and helium (c. Scientists have debated over GJ 1214b since the planet was discovered back in 2009. GJ 1214b … On the basis of planetary models[15] it has been suggested that GJ 1214 b has a relatively thick gaseous envelope. In this paper, we report observations of three transits of GJ 1214b, taken as part of the Apache Point Observatory Earth’s water is equal to 0.05 percent of its mass, while GJ 1214b’s water contributes 10 percent of its mass! it would be more like thick hot ice or alternately acting more like a gas than a liquid. In December 2010, a study was published showing the spectrum to be largely featureless over the wavelength range of 750–1000 nm. Its low mass suggests that unlike Earth GJ 1214b may only have a small amount of rock in its composition. Water on GJ 1214b would now have a very strange consistency and would seem very alien to us, as a result of high temperatures and atmospheric pressure GJ 1214 bは、木星型惑星よりも … GJ 1214b must be made of a significant quantity of water -- 75% water -- in addition to some rock and iron. [7] If it is a waterworld, it could possibly be thought of as a bigger and hotter version of Jupiter's Galilean moon Europa. In particular, it is unclear if hydrogen and helium are present or if the atmosphere is water dominated. [1], In December 2013, NASA reported that clouds may have been detected in the atmosphere of GJ 1214 b. "GJ 1214b is like no planet we know of," Berta said. [1] The loss of primordial atmosphere was indirectly confirmed in 2020 as no helium was detected at Gliese 1214 b. 2011). The exoplanet, orbiting a small star only 40 light-years away from us, has a mass about six times that of the Earth. Its host star, GJ1214, is a small, red type M star about one-fifth the size of the Sun. Planet orbits a red dwarf star which has only 16 % the mass the! Clouds found in its composition published in Nature announcing the planet originally formed as ice. By CfA 's David Charbonneau, discovered GJ 1214b, also known as Gliese 1214b also. 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