Evidence of 250-mile wide impact zone found deep underground
Dwarf planets have recently become a key focus of exploration
Feb. 18, 1930: Pluto is first identified in photographs of the night sky
About 70,000 years ago
The fiery meteor likely left pieces of space rock scattered around western Pennsylvania, scientists say
The probe is scheduled to fly past the dwarf planet on July 14 this year
Kepler-444 could help pinpoint when planets started to form
The rock will hurtle through space at just three times the distance between the Earth and the sun
The asteroid and its companion were too far away to pose a threat
This discovery, if accurate, could completely redraw the map of the Solar System
A remarkable spacecraft approaches the solar system's last known planet (and yes, it's a planet)
Best view is Saturday night and early Sunday morning
A retired astronaut on the great folly of the new space age
Principal New Horizons scientist answers all your burning queries
New Horizons will come closest to the dwarf planet on July 14
NASA's reprocessed picture of Jupiter's Europa gives us a fresh look at the likeliest place in the solar system for extraterrestrial life.
A pair of sort-of comets pose a puzzle for astronomers
A meteor, a military launch — or something much more sinister?
A populist uprising restores a space favorite to the planetary ranks. Will the astronomers listen?
We already knew Miranda, one of Uranus's five major moons, has "one of the strangest and most varied landscapes among extraterrestrial bodies." Now, we...