About Mars
0 分(共0人投票)
青出于蓝---
About Mars Mars is a bit smaller than the Earth,it's semidiameter is 53%of that of the Earth,and it's volume is Earth's15%,the mass is 11% and the superficial gravity is 38%.There are thin air surrounding the Mars, 95% of them is carbon dioxide and 3% is nitrogen ,the atmospheric density is about 1%
( 查看全文 )
07-24