(PhysOrg.com) -- Moon's craters, together with samples of the surface returned during the Apollo program, tell the story of impacts from two different populations of small bodies. The first rocky collection ...

Space & Earth - Space Exploration

Mar 19, 2012 4.3 / 5 (3) 0 |

Astronomers have found that the extrasolar planet HAT-P-7b has a retrograde or highly tilted orbit. Studying such planets is important in understanding the diversity of planetary systems and assessing current ...

Space & Earth - Astronomy

Nov 18, 2009 4.8 / 5 (6) 1