File:Kepler186f-ComparisonGraphic-20140417.jpg
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摘要[編輯]
描述Kepler186f-ComparisonGraphic-20140417.jpg |
English: Kepler-186 and the Solar System
http://www.nasa.gov/ames/kepler/kepler-186-and-the-solar-system http://www.jpl.nasa.gov/news/news.php?release=2014-119 http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA18000 The diagram compares the planets of our inner solar system to Kepler-186, a five-planet star system about 500 light-years from Earth in the constellation Cygnus. The five planets of Kepler-186 orbit an M dwarf, a star that is is half the size and mass of the sun. The Kepler-186 system is home to Kepler-186f, the first validated Earth-size planet orbiting a distant star in the habitable zone—a range of distance from a star where liquid water might pool on the planet's surface. The discovery of Kepler-186f confirms that Earth-size planets exist in the habitable zones of other stars and signals a significant step toward finding a world similar to Earth. The size of Kepler-186f is known to be less ten percent larger than Earth, but its mass and composition are not known. Kepler-186f orbits its star once every 130 days, receiving one-third the heat energy that Earth does from the sun. This places the planet near the outer edge of the habitable zone. The inner four companion planets each measure less than fifty percent the size of Earth. Kepler-186b, Kepler-186c, Kepler-186d and Kepler-186, orbit every 4, 7, 13 and 22 days, respectively, making them very hot and inhospitable for life as we know it. The Kepler space telescope infers the existence of a planet by the amount of starlight blocked when it passes in front of its star. From these data, a planet's radius, orbital period and the amount of energy recieved from the host star can be determined. The artistic concept of Kepler-186f is the result of scientists and artists collaborating to imagine the appearance of these distant worlds. |
日期 | |
來源 | [1], [2] |
作者 | NASA Ames/SETI Institute/JPL-Caltech |
Derivative works of this file: Kepler186f-ComparisonGraphic-20140417 improved.jpg: (reduced to the scientific facts without any speculation about the appearance of Kepler 186-f)
協議[編輯]
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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現時 | 2016年5月20號 (五) 19:43 | 4,534 × 2,550(2.42 MB) | MarioProtIV(傾偈 | 貢獻) | Reverted to version as of 18:46, 17 April 2014 (UTC): Not English | |
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作者 | NASA/JPL-Caltech/T. Pyle |
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攞放方向 | 正常 |
橫解像度 | 300 dpi |
直解像度 | 300 dpi |
用過嘅軟件 | Adobe Photoshop CS5 Windows |
檔案更動日期時間 | 2014年4月11號 (五) 11:25 |
色彩空間 | sRGB |
制成數碼日期時間 | 2014年4月8號 (二) 02:19 |
Date metadata was last modified | 2014年4月11號 (五) 04:25 |
Unique ID of original document | xmp.did:2A9BF1C838BFE311A818E88837AF34D6 |