2012年11月30日金曜日

New Evidence for Water Ice at Mercury's Poles


 
 New observations by the MESSENGER spacecraft provide compelling support for the long-held hypothesis that Mercury harbors abundant water ice and other frozen volatile materials in its permanently shadowed polar craters.

 Data indicate the ice is buried beneath an unusually dark material across most of the deposits, areas where temperatures are a bit too warm for ice to be stable at the surface itself.
 NASA HP

0 件のコメント: