When you look up at the sky and see the sun beaming down at you, it’s hard to tell how truly big it is. So consider this: 1.3 million duplicates of Earth could comfortably fit inside of it, according ...

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. Michelle Starr is CNET's science editor, and ...