To my mind, that makes it more of a "sub-Neptune" than a "super-Earth," but this is semantics. After COROT-7b, it was the second super-Earth to be known[1] and is the first of a new class of planets with small size and relatively low density. The planet GJ 1214b, shown here in an artist’s conception with two hypothetical moons, orbits a “red dwarf” star 40 light-years from Earth. [1] The loss of primordial atmosphere was indirectly confirmed in 2020 as no helium was detected at Gliese 1214 b. Up to date there is no consensus about the composition of its envelope although most studies suggest a high molecular weight atmosphere. GJ 1214 bは、木星型惑星よりも … Due to the relatively small size of GJ 1214 b's parent star, it is feasible to perform spectroscopic observations during planetary transits. This image shows an artist's view of the planet Gliese 1214 b in front of its host star. it would be more like thick hot ice or alternately acting more like a gas than a liquid. While its mass is similar to CoRoT-7b, its diameter is larger, so its density is lower. GJ 1214b (also spelled Gliese 1214b) is an extrasolar planet orbiting the M4.5V dwarf star GJ 1214 in the constellation Ophiuchus, about 42 light-years away. GJ 1214b Mass and Radius GJ 1214b is estimated to have a mass of around 6 to 7 times that of Earth, with a radius of around 2.7 times that of Earth, its low mass suggests a large amount of the planet is made up of water. [4][5] For that reason, scientists have nicknamed the planet "the waterworld". GJ 1214 bは、へびつかい座の方向に約42光年離れた位置にある恒星 GJ 1214を公転している太陽系外惑星で、2009年12月に発見された。 2017年現在、GJ 1214 bは海洋惑星である可能性が最も高い候補である 。 そのため、科学者たちはGJ 1214 bをThe waterworldと呼んだ 。. GJ 436b is categorized as a "warm Neptune" because it is much closer to its star than frigid Neptune is to the sun. [7] GJ 1214 b could be a rocky planet with an outgassed hydrogen-rich atmosphere, a mini-Neptune, or an ocean planet. As of 2017, GJ 1214 b is the most likely known candidate for being an ocean planet. Its host star, GJ1214, is a small, red type M star about one-fifth the size of the Sun. 글리제 1214 b는 그 질량과 반지름이 태양계 내 가스 행성들보다 작은 것으로 검증된 두 번째 외계 행성이다(첫 번째로 검증된 행성은 CoRoT-7b이다). Here we report observations of the transiting planet GJ 1214b, which has a mass of 6.55 M_Earth and a radius 2.68 times Earth's radius (R_Earth), indicating that it is intermediate in stature between Earth and the ice giants of the Solar System. [6], It is a super-Earth, meaning it is larger than Earth but is significantly smaller (in mass and radius) than the gas giants of the Solar System. Its equilibrium temperature is believed to be in the range of 393–555 K (120–282 °C; 248–539 °F), depending on how much of the star's radiation is reflected into space. It is thought the planet originally formed as an ice world far from its host star. [1] Given the planet's mass and radius, its density can be calculated. [7] While no scientist has stated to believe GJ 1214 b is an ocean planet, if GJ 1214 b is assumed to be an ocean planet,[15] i.e. GJ 1214b … Despite being hot its high atmospheric pressures would stop its oceans from boiling. Image credit: CfA/David Aguilar Image: This is an illustration of the hypothetical appearance of the exoplanet GJ 1214b, which is known as a "super-Earth" type planet because it is slightly more than six Earth masses. For that reason, scientists have nicknamed the planet "the waterworld". Follow-up radial-velocity measurements were then made with the HARPS spectrograph on the ESO's 3.6-meter telescope at La Silla, Chile; those measurements succeeded in providing independent evidence for the reality of the planet. Through a comparison with theoretical models, the density in turn provides limited but highly useful information about the composition and structure of the planet.[1]. 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The only example of such a planet between one and ten times the mass of the.! To Harvard-Smithsonian Center for Astrophysics scientist and lead author Zachory Berta, `` GJ1214b is like no planet we of! Candidate for being an ocean planet relatively small size of the Earth world, GJ1214b, is 42 light-years the. 지구로부터 뱀주인자리 방향으로 약 40광년 떨어진 곳에 있는 글리제 1214 주위를 돌고 있는 외계 (! Planet originally formed as an ice world far from its host star, it is unclear if hydrogen helium.

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