Where's Planet X? NASA Space Telescope Discovers Thousands of New Stars, But No 'Nemesis'
Despite finding a slew of new stellar bodies outside the solar system, NASA's WISE telescope discovered no suggestion of a brown dwarf companion to the sun or a massive hidden planet.
Rare Sight: Hubble Telescope Sees Asteroid Falling Apart (Video, Photos)
Astronomers have seen comets break apart as they near the sun, but they'd never witnessed anything similar in an asteroid in the main belt — until now. Hubble images show that the asteroid, known as P/2013 R3, has fragmented into 10 pieces.
Small Asteroid Gives Earth a Close Shave, 3rd in 2 Days
The 25-foot-wide (8 meters) asteroid 2014 EC came within 38,300 miles (61,600 kilometers) of our planet at 4:21 p.m. ET today, NASA officials said. For comparison, the moon orbits Earth at an average distance of 239,000 miles (385,000 km).