Look up at the sky on a clear night, and you’ll see thousands of stars – about 6,000 or so. But that’s only a tiny fraction of all the stars out there. The rest are too far away for us to see them.

On a clear night, the sky looks crowded with tiny lights. Some twinkle. Some glow steady. They look close enough to count, but they are not. That question pops up in curious minds: How many stars are ...

The team's findings, which were published Monday in the journal Nature, also unveil a method of investigating dark matter, which remains one of the universe's greatest mysteries. Astronomers setting ...

Kerry Breen is a news editor at CBSNews.com. A graduate of New York University's Arthur L. Carter School of Journalism, she previously worked at NBC News' TODAY Digital. She covers current events, ...