Mercury retrograde starts Saturday, March 15 and goes through April 7. Here's what to know about how the first Mercury ...

Mercury, the first planet from the sun, is about to stand out among the stars this week. But this brightness is not expected ...

Astronomers call this “apparent retrograde motion” because it is an optical illusion. Mercury completes its orbit around the ...

I pick out North America’s celestial highlights for the weekend (which also applies to northern hemisphere mid-northern ...

Astronomers have identified a quartet of small rocky planets orbiting Barnard's star - one of our closest stellar neighbors - ...

A rare grouping of 10 celestial bodies is captured in a stunning new photo taken during last weekend’s great planetary parade ...

California stargazers can spot an unusual sight in the night sky in March: a total lunar eclipse with a blood-red moon. In ...

If you haven't caught the "planet parade," don't despair. This Friday should offer the best glimpse of one of the most elusive planets.