Comets: Soft shell, hard core?

30 julio 2015

Comet Churyumov-Gerasimenko poses new riddles: Surface material measurements performed by the Philae landing module indicate that the near surface material might have changed since its formation. Up to now, many researchers had assumed that it has remained in virtually the same state since its formation about 4.5 billion years ago.img src=»» height=»1″ width=»1″ alt=»»/