The meteor that exploded over Russia was much smaller than the asteroid that will buzz Earth Friday. But it shows how destructive Earth impacts can be – and how unexpected.
Quadrantid meteor shower: With a bright gibbous moon, the best time to view the Quandrantid meteor shower is between 2 a.m. and 7 a.m. EST, before the sun rises.
Tatooine-like planet: In a cosmic first, astronomers have discovered two alien planets orbiting two stars, not unlike Luke Skywalker's home planet in the Star Wars films.
Scientists have announced the discovery of a fifth moon of Pluto. Dubbed P5 for now, it is the smallest moon yet detected orbiting the frigid dwarf planet.
Using data from the Hubble telescope, SETI scientists spotted a fifth moon orbiting the icy dwarf planet Pluto.
Long considered a planet, Pluto was reclassified as a 'dwarf planet' in 2006 by the International Astronomical Union. Will the discovery of a fifth moon prompt astronomers to reconsider?
Scientists examining data from NASA's Hubble Space Telescope have spotted a fifth moon orbiting Pluto. The moon is currently labeled S/2012 (134340) 1, a monicker that could probably be improved.
Almost exactly a year after it spotted a fourth moon orbiting the icy dwarf planet, the Hubble Space Telescope has detected a fifth one.
Opportunity is hunkering down at a spot called Greeley Haven, a rocky outcrop along the rim of the Red Planet's huge Endeavour crater.
The Quadrantids are notoriously unpredictable, but if any year promises a fine display, this could be it.