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主題: Gliese 9827 可能 3 顆 super earth 作者: peter 於 2017-09-14 07:44:12 https://www.universetoday.com/137179/three-possible-super-earths-discovered-around-nearby-sun-like-star/
100光年可能 3 顆 super earth (https://www.universetoday.com/wp-content/uploads/2017/09/threesuperea-580x574.jpg) GJ 9827 b 約 1.64 地球半徑, 質量 4.25 地球質量, 軌道1.2 天 溫度 1,119 K (846 °C; 1555 °F). GJ 9827 c 約 1.29 地球半徑i, 質量 2.62 地球 ,軌道 3.6 days, 溫度 temperature of 774 K (500 °C; 934°F). GJ 9827 d 約 2.08 地球半徑, 質量 5.3 地球 ,軌道 6.2 , temperature of 648 K (375 °C; 707 °F). 主題: 回覆： Gliese 9827 可能 3 顆 super earth 作者: peter 於 2018-02-09 19:18:57 https://www.sciencedaily.com/releases/2018/02/180208131710.htm
This is why GJ 9827's three planets are special -- with radii of 1.64 (planet b), 1.29 (planet c) and 2.08 (planet d), they span this dividing line between super-Earth (rocky) and sub-Neptune (somewhat gassy) planets. |