本帖最后由 sonic5188 于 2010-9-30 20:09 编辑
回复 6# gohomeman1
哥,不知道半径啊,谁都不知道该行星的半径啊,只知道质量3-4倍地球
国外网站有人估算重力加速度为1.2-1.4g
如果上述估算对的话,倒推半径为1.6-1.7地球半径
该行星密度大约为0.8地球密度,很有可能存在较厚大气层。
晕倒,我又找了一篇
http://www.eurekalert.org/pub_releases/2010-09/ci-php092810.php
"Our calculations indicate that the planet is between 3.1 and 4.3 Earth masses, has a circular 36.6-day orbit, and a radius estimated between 1.2 and 1.5 Earth radii," remarked co-author Paul Butler of Carnegie's Department of Terrestrial Magnetism.
Its semi-major axis—half the length through the long direction of its elliptical orbital path—is 0.146 astronomical units (one AU is the distance between the Earth and the Sun), and its surface gravity is similar to Earth's at 1.1 to 1.7 g.
密度为1.27-1.79地球密度,1.27是很可能为熔融铁核心的,引力能比地球更进一步压缩核心密度,所以密度能升高,
但1.79就不太可能吧!难道这个行星有个熔融的黄金核心,哈哈哈哈哈 |