American astronauts have performed 239 spacewalks, each of which typically lasted six hours or more.
The surprising motions of young stars could offer clues about stellar evolution.
A life-size model of a huge new space observatory described as the successor to the Hubble Space Telescope is on display at the World Science Festival at New York City's Battery Park.
The space shuttle Atlantis returned back to Cape Canaveral in Florida this morning after its final scheduled mission.
Two new studies have turned up some surprising results and could help explain the evolution of galaxies.
Located some 600 light-years away, the planet WASP-12b is being swallowed up by its sun. Scientists say that the gas giant may only have another 10 million years left before it is completely devoured.
New findings suggest that the ability of life to thrive on an alien world might depend on the wild orbits of its planetary neighbors.
The case for adding new ground-based telescopes is compelling, astronomy experts say. But they cost $700 million to $1 billion apiece just to build.
A Florida photographer captured both the Space Shuttle Atlantis and the International Space Station in silhouette in front of the sun last Sunday.