Insane Curiosity on MSN

Alien objects keep entering through the solar system’s ceiling

Interstellar visitors don’t have this problem because they were never part of the solar system’s plane to begin with.
Astronomy on MSN

The sky today on Monday, June 1: Mercury at its best

Looking for a sky event this week? Check out our full Sky This Week column. May 31: Blue Moon, red star Mercury is at its best for the year. It's now easy to spot in the evening sky, already 10° above ...