After more than 55 days flying over Antarctica, NASA's huge Super-TIGER scientific balloon has broken the record for the longest flight of its kind, bringing back a wealth of data.
A US spacecraft orbiting Mars has provided evidence of an ancient crater lake fed by groundwater, adding further support to theories that the Red Planet may once have hosted life.
The US and European space agencies announced a new partnership Wednesday pairing a European cargo module with NASA's Orion space capsule, which aims to take astronauts into deep space.
The Mars rover Curiosity will soon begin to drill into the Red Planet for the first time, mission officials said Tuesday ahead of the highly anticipated endeavor.
The Milky Way contains at least 17 billion planets the size of Earth, and likely many more, according to a study out Monday that raises the chances of discovering a sister planet to ours.
A fist-sized meteorite nicknamed "Black Beauty" could unlock vital clues to the evolution of Mars from the warm and wet place it once was to its current cold and dry state.
The Hubble Space Telescope is giving scientists a look at the oldest galaxies ever seen, dating back some 13.3 billion years -- providing a glimpse into how the cosmos must have looked right after the Big Bang.
NASA suffers from a "mismatch" between its goals and the budget it has been given to achieve them, according to a panel that said the US space agency may need a complete overhaul.
Scientists Thursday announced new evidence that Mercury, the planet orbiting nearest the Sun, hosts massive caches of ice and revealed new information on how water reached our solar system's inner planets.
NASA downplayed Wednesday talk of a major discovery by its Martian rover after remarks by the mission chief raised hopes it may have unearthed evidence life once existed on the Red Planet.
The unmanned SpaceX capsule made a safe splashdown in the Pacific Sunday after successfully delivering its first commercial payload to the International Space Station.
US firm SpaceX aims for its next big launch into orbit Sunday -- the first of 12 flights in its $1.6 billion contract with NASA to bring supplies to and from the international space station.
A woman took command of the International Space Station for only the second time Monday as three US and Russian colleagues made a safe return from the orbiting space lab to the Kazakh steppe.
NASA's Opportunity rover, older brother to the Curiosity rover that landed on Mars last month, has made a new discovery that geologists find both puzzling and exciting.
US scientists have for the first time found proof that planets can form and survive around sun-like stars within dense star clusters, NASA said Friday.