Three crewmembers who have been aboard the International Space Station for an extended, 6.5-month mission will be heading home on Thursday, with no launch date set for their replacements.
Scientists are considering further targets for NASA's New Horizons spacecraft to visit following its Pluto encounter this summer, should funding be provided.
An unexpected leak of a chemical designed to tag complex organic molecules in samples collected by NASA’s Mars rover Curiosity appears to have serendipitously done its job.
Russia says it will support U.S. plans to keep the International Space Station operating through 2024, but then wants to split off three still-to-be launched modules to form a new orbital outpost.
NASA this week begins work to reassemble parts of the International Space Station to create parking spots for two commercial space taxis.
The world's biggest and most powerful particle smasher is gearing up for hunt for new particles, including mysterious dark matter and clues for supersymmetry.
The European Space Agency is preparing for launch next week of a small reusable spacecraft that is due to make its first test run beyond the atmosphere.
Engineers have found a way to buy some time for the MESSENGER spacecraft, which was due to end its four-year mission in March with a suicidal plung
The Milky Way may be home to some 3,000 extraterrestrial civilizations but the vast distances between our galactic cousins will make contact extremely rare, a new study concludes.
A NASA-backed study explores an innovative way to dramatically cut the cost of a human expedition to Mars -- put the crew in stasis.
Less than a month after saying he'd be "bitterly disappointed" if Virgin Galactic flights don't start by the end of the year, Richard Branson admits that we'll need to wait a little longer.
Last night, two more of Planet Lab’s shoebox-sized Earth imaging satellites launched themselves from aboard the International Space Station, the latest in a series of technical mysteries.
British soprano Sarah Brightman will begin training in January for a 2015 visit to the International Space Station.
The Search for Extraterrestrial Intelligence, or SETI, may becoming more mainstream, as evidenced by this week’s House Science and Technology Committee hearing.
New observations from NASA’s Saturn-orbiting Cassini spacecraft show what appear to be glints of sunlight bouncing off a wind-rippled lake on the moon Titan.
Astronomers have found a mind-bogglingly large structure — so big it takes light 10 billion years to traverse — in a distant part of the universe.
John Graves, one person with a ticket to space on a flight of Virgin Galactic's SpaceShipTwo, explains why he bought a flight to space.