Kepler 442b is an Earth-sized exoplanet orbiting within the habitable zone of the K-type main sequence star, Kepler-442, around 1,206 light years from Earth in the Lyra constellation. In 2009, NASA's Kepler spacecraft was observing stars on its photomete
一颗近地大小名为Kepler-442b的系外岩质行星,距离地球1206光年,在这个指数下评级为0.836。作为对比,地球的评级为0.829,居然小于这颗系外行星教育在线观看 地球居然不是最适合人类居住的行星?根据2015年国际天文组织设定的一项星球宜居指数,地球居然并不是宇宙迄今为止发现的最适合居住的行星。一颗近地大小名为Kepler-...
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Four of these new planets are less than 2.5 times the size of Earth and orbit in their sun's habitable zone, defined as the range of distance from a star where the surface temperature of an orbiting planet may be suitable for life-giving liquid water. One of these new habitable zone pla...
Kepler-438b orbits at a distance of\n0.166AU to its host star, and hence may be susceptible to atmospheric\nstripping. Our sample is taken from the Habitable Exoplanet Catalogue, and\nconsists of the stars Kepler-22, Kepler-61, Kepler-62, Kepler-174, Kepler-186,\nKepler-283, Kepler-...
In this paper an empirical formula is presented for an efficient initial estimate for the iterative solution of Kepler's equation. This formula is essentially a polynomial in eccentricity and mean anomaly whose coefficients have been obtained by minimizing the sum of the squared differences of the ...
Due to the large average distance of 500-‐1000pc to its target stars, Kepler's results can only provide statistics of the amount of planets per star. ...
Figure 12 shows density distributions along lines perpendicular to the equator located at different distances from the star: 2, 10 and 20 radius of the star. They are shown in Figure 9 by thin vertical lines. The disk survives at least up to the distance of 20 stellar radii. This is a ...
Kepler-442b orbits its host star for 112 days, 9 hours, 10 minutes, and 24 seconds, with an orbital radius roughly 0.4 times that of Earth (a little larger than the distance of Mercury from the Sun, which is about 0.38 AU). It receives roughly 70% of the sunlight that the Earth re...