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The first commercial cargo run to the International Space Station is off until spring.
NASA's retired space shuttle Atlantis is a step closer to completing its final journey.
A private California company will attempt the first-ever commercial cargo run to the International Space Station in February.
Scientists have found the biggest black holes known to exist — each one 10 billion times the mass of our sun.
A rover of "monster truck" proportions zoomed toward Mars on an 8 1/2-month, 354 million-mile journey Saturday, the biggest, best equipped robot ever sent to explore another planet.
After decades of scouring the universe, astronomers finally have found two immense clouds of gas that are pristine — free of the metals fired out into the cosmos by stars.
An asteroid as big as an aircraft carrier zipped by Earth on Tuesday in the closest encounter by such a massive space rock in more than three decades. Scientists ruled out any chance of a collision but turned their telescopes skyward to learn more about the object known as 2005 YU55.
Astronomers finally know why the first documented supernova was super-sized.
That dead NASA satellite fell into what might be the ideal spot — part of the southern Pacific Ocean about as far from large land masses as you can get, U.S. space officials said Tuesday.
NASA needs to keep more astronauts on staff than planned even though no one is being launched from the home turf, a new report urged Wednesday.
Russia's space agency says it has postponed the launch of the next manned Soyuz spacecraft to the International Space Station until Nov. 12, just days before the remaining astronauts on the orbiting laboratory are due to return to earth.
A pair of spacecraft rocketed toward the moon Saturday on the first mission dedicated to measuring lunar gravity and determining what's inside Earth's orbiting companion — all the way down to the core.
Astronauts may need to take the unprecedented step of temporarily abandoning the International Space Station if last week's Russian launch accident prevents new crews from flying there this fall.
NASA's humanoid robot has finally awakened in space.
A sun-powered robotic explorer named Juno is rocketing toward Jupiter on a fresh quest to discover the secret recipe for making planets.
Spacewalking astronauts released a ham radio satellite outside the International Space Station on Wednesday despite a missing antenna that will hamper operations.
NASA's upcoming mission to Jupiter can't get much greener than this: a solar-powered, windmill-shaped spacecraft. The robotic explorer Juno is set to become the most distant probe ever powered by the sun.
NASA's mighty astronaut corps has become a shadow of what it once was. And it's only going to get smaller.
The space shuttle passed into history Thursday, the words "wheels stop" crackling over the cockpit radio for the very last time.
Four astronauts are taking space shuttle Atlantis for one last spin — the very last one of the 30-year space shuttle era.
After a hectic week in orbit, the astronauts on NASA's last space shuttle flight got some time off Thursday to savor their historic experience.
A space shuttle commander once confided that countdowns were invented merely to make astronauts nervous, and he was — every time. But when the count reached zero and the booster rockets ignited, he was in total, calm control.
America's longest space-flying streak ends this week with the smallest crew in decades — three men and a woman who were in high school and college when the first space shuttle soared 30 years ago.
Thunderstorms threatened to delay NASA's last space shuttle launch set for Friday with lightning striking near the pad as astronauts descended on Cape Canaveral by the dozens on the eve of the historic flight.
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