NASA's Fermi Gamma-ray Space Telescope has discovered a massive structure spreading halfway across the Milky Way.
The Pentagon says it is investigating a possible rogue missile launch detected off the coast of Southern California.
Air crew and frequent fliers could run health risks from space weather, according to a report from insurers Lloyds.
After a week in which the final launch of space shuttle Discovery has been postponed on an almost daily basis, NASA has announced that it won't be taking off until at least the end of the month.
NASA's planning to spend $5 million a year over the next three years on the development of a hypersonic vehicle that could fly at five times the speed of sound.
NASA's Deep Impact spacecraft got a closeup view of comet Hartley 2 yesterday, getting within 435 miles of the comet.
A prominent scientist who decoded the human genome has hypothesized that recruiting genetically enhanced astronauts could help boost NASA's manned spaceflight program into warp speed.
NASA and DARPA are teaming up to examine the feasibility of designing a "100-year Starship" capable of interstellar travel.
Brown University planetary geologists have identified a spot on Mars which they say could have been one of the most recent habitable microenvironments on the planet.
Earth-sized planets could be ten a penny, say UC Berkeley astronomers, who estimate they may orbit as many as a quarter of all Sun-like stars.
Astronomers have discovered buckyballs in another galaxy for the first time, lending weight to the theory that they may have been responsible for the arrival on Earth of chemicals key to the origin of life.
Astronomers have long used powerful telescopes to peer into the past. But now, NASA and ESA are using the Hubble Space Telescope to look thousands of years into the future.
NASA says the crash of a space balloon earlier this year was caused by human error - and that mistakes like an inability to remember the phone number of the Australian emergency services contributed to the danger.
It's a major milestone today for the future of commercial space travel as the first runway at the world's first spaceport has been completed.
NASA has concluded that there may be enough water on the moon to sustain a manned lunar base.
Scientists have discovered the most distant - and oldest - galaxy yet, viewing it just 600 million years after the Big Bang.
A Washington State University professor is calling for one-way missions to Mars - and says he'd be happy to volunteer himself.
NASA is pressing ahead with last-minute repairs to the Discovery space shuttle in order to hit the planned November 1 launch date.
Astronomers have spotted what's been confirmed as a collision between two asteroids that took place just last year beyond the orbit of Mars.
Oh, great. The moving men were booked, we'd said goodbye to the neighbors and we'd given away the cat - and now it seems that there may not be a habitable planet orbiting Gliese 581 after all.