For most of 2012, Phil Plait of Bad Astronomy tweeted a random astronomy fact every day. To kick off 2013, you can read all of those facts in one place.

A year ago, I introduced a “Prime 9” list of the best objects to show at public star parties. The “Prime 9” idea was inspired by a show of the same name that airs on the MLB Network.

Bad Astronomy 15 Facts About Our Planet for Earth Day. By Phil Plait. April 22, 2013 8:00 AM. Our lovely and fragile home. Click to engaiaenate.

I'm thinking of erecting a large sign on the front lawn: Wanted - somebody to chat with about the Big Bang, black holes and supernovae. About neutron stars so dense that a thimbleful of the stuff ...

How are stars named? And what happens when they die? These star facts explain the science of the night sky. When you purchase through links on our site, we may earn an affiliate commission. Here ...

You may have a totally new zodiac sign, according to an astronomy society that redefined the zodiac calendar, but NASA wants to clarify its role in the matter. Back in 2011, as TIME reported ...

Black holes are real — and they're some of the most mysterious objects in space. Discover what they are, how they form, and why they captivate scientists.

The Center for Astrophysics and Space Astronomy (CASA) is dedicated to advancing our understanding of the Universe in which we live through observations, theory, and the development of ground-based ...