On Sunday (Jan. 12), the Red Planet will make its close approach of Earth at 8:32 a.m. EST (13:32 GMT). This event, known as perigee, causes Mars to appear bigger and brighter in the sky than usual, ...

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun on Jan. 15. It will be visible all night long because it will rise with the ...

Mercury takes only 88 Earth days to orbit the sun.

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

During its opposition, Mars also gets the sun's full glare, as seen from Earth. That makes the Red Planet's surface features more easily observed by amateur astronomers and astrophotographers ...

Planets with suns like Wolf 359 are subject to huge blasts of radiation that raise questions about their long-term ...