One of the researchers who helped demote Pluto believes he may have found a new ninth world, much bigger and way farther out.
A surprising find has researchers thinking that they may have discovered a "Solar System 2.0."
Astronomers have found the very first quintuple star system consisting of two sets of eclipsing binary stars and one solo star.
By using the world's preeminent telescopes, astronomers peer behind a curtain of dust to find a giant star-making factory known as "Sparky."
A giant star in the Canis Majoris constellation isn't acting like itself, and scientists are doing their best to figure out why.
Speaking to Congress, two astronomers from SETI describe the chances of finding aliens as almost 100 percent.
Scientists pull a needle out of a haystack and identify a star that dates back to shortly after the Big Bang.
The SpaceView program will reach out to amateur astronomers in an effort to protect satellites from space junk orbiting the Earth.
For nearly 50 years, Palomar Observatory's Hale Telescope, near San Diego, was the most important device of its kind in the world. Even now, it's still used 290 nights a year. CNET Road Trip 2012 stopped by to check it out.
Pundits square off over whether the social network has the chops to deliver revenue from its massive user base to support its valuation.