gj 1214b mass

"GJ 1214b is like no planet we know of," study lead author Zachory Berta of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass., said in a statement. Illustration of planet GJ 1214b 5. GJ 1214b must be made of a significant quantity of water -- 75% water -- in addition to some rock and iron. 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. [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. Gliese 1214 is a dim M4.5 red dwarf in the constellation Ophiuchus with an apparent magnitude of 14.7. It is located at a distance of approximately 47 light years from Earth. 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. GJ 1214b stands out among the detected low-mass exoplanets, because it is, so far, the only one amenable to transmission spectroscopy. The actual bulk make-up of GJ 1214b is determined by its unknown formation, migration, and evolution history. 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 。. it would be more like thick hot ice or alternately acting more like a gas than a liquid. Clouds in Atmosphere of Exoplanet GJ 1214b (Artist's View).tif 4,000 × 3,000; 7.92 MB CompositionOfKepler-10b.jpg 720 × 541; 54 KB Exoplanet Comparison GJ … Gliese 1214 b (often shortened to GJ 1214 b) is an exoplanet that orbits the star Gliese 1214, and was discovered in December 2009. 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. 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. 글리제 1214 b는 지구로부터 뱀주인자리 방향으로 약 40광년 떨어진 곳에 있는 글리제 1214 주위를 돌고 있는 외계 행성이다. 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. GJ 1214b is a huge “waterworld” three times the size of Earth that can be found 42 light-years away from our solar system. “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. Spectroscopic observations with NASA's Hubble Space Telescope provide evidence of high clouds blanketing the planet. Gliese 1214 b (thường được rút ngắn thành GJ 1214 b aka Ocean Planet) là một ngoại hành tinh quay quanh ngôi sao Gliese 1214, và được phát hiện vào tháng 12 năm 2009. GJ 1214 bは、木星型惑星よりも … The planet, designated GJ 1214b, is only 2.7 times the diameter of Earth — one of the smallest exoplanets found — and orbits just over a million miles from its star (compare to Earth’s 92 million miles) in a zippy 38-hour ‘year.’ Given its size and density, astronomers speculated that GJ 1214b may very well be covered in deep oceans. [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. GJ 1214b, first discovered in December 2009, is 2.7 times the size of Earth and 6.5 times as massive. They then observed the star more closely and confirmed that it dimmed by roughly 1.5% every 1.58 days. 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. In particular, it is unclear if hydrogen and helium are present or if the atmosphere is water dominated. [13], GJ 1214 b may be cooler than any other known transiting planet prior to the discovery of Kepler-16b in 2011 by the Kepler mission. 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. Since astronomers know GJ 1214b's mass and size, they're able to calculate its density, which turns out to be just 2 grams per cubic centimeter (g/cc). Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. For instance, if GJ 1214b initially formed beyond the snow line it would contain more icy material than if it formed closer to its star. GJ 1214b’s size and mass (2.65 and 6.45 times that of the Earth, respectively;Carter et al.2010) give it a density intermediate to that of our solar system’s inner (rocky) and outer (gas-dominated) planets. GJ 1214b is different. 0.05%). The planet orbits a small red dwarf star which has only 16% the mass of our own sun. A super-Earth is defined as a planet between one and ten times the mass of the Earth. Previous observations of the planet's size and mass demonstrated it has a low density for its size, leading astronomers to conclude the planet is some kind of solid body with an atmosphere. It is thought the planet originally formed as an ice world far from its host star. 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. 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. In early 2009, the astronomers running the project noticed that the star GJ 1214 appeared to show drops in brightness of that sort. GJ 1214b has a radius of about 2.7 times that of Earth and is about 6.5 times as massive, putting it squarely into the class of exoplanets known as super-Earths. Earth’s water is equal to 0.05 percent of its mass, while GJ 1214b’s water contributes 10 percent of its mass! A new analysis detailing the atmosphere of GJ 1214b—a planet located about 40 light years from earth and one that researchers have studied since 2009—appeared in the March issue of The Astrophysical Journal. Credit: NASA, ESA, and D. Aguilar (Harvard-Smithsonian Center for Astrophysics). [7] Because of the varying pressure at depth, models of a water world include "steam, liquid, superfluid, high-pressure ices, and plasma phases" of water. Scientist and lead author Zachory Berta, `` GJ1214b is like no we! 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