Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Almost all of the universe is invisible stuff called dark matter and dark energy.
After a problem with the heating system, Endeavour and its crew are ready to launch on May 16.
Volcanoes believed to draw energy from the Jupiter's gravity as Io rotates around the gas giant.
Discovery provides astronomers ideal way to study star formation and evolution.
Exoplanets called hot Jupiters traveling in reverse may have flipped orbits.
The United States military's DARPA wants ideas to help s the 100-Year Starship project.
A group of NASA astronauts and scientists will test concepts and practice techniques for the future excursion on an asteroid in a simulated environment on the ocean floor.
The comet Elenin, first discovered last fall, will be making a visit to the inner solar system and near Earth soon.
After more than a week of testing and repairs on the space shuttle Endeavour, NASA has officially set the space shuttle's last launch date.
President Barack Obama views China as a potential partner for an eventual human mission to Mars. Any manned Mars spacecraft voyage would likely require international cooperation.
Missions to explore seas on Saturn's moon Titan, the interior of Mars and land on a comet are the main candidates for a 2016 launch.
The historic first American spaceflight by astronaut Alan Shepard and NASA's Messenger Mercury mission are being honored as the faces of new U.S. postage stamps.
NASA's Gravity Probe B, orbiting around Earth, has confirmed two key predictions of Albert Einstein's descriptions of how gravity causes masses to warp space-time around them.
Biographer Neal Thompson talks about Alan Shepard's historic spaceflight as the first American in space.
On the anniversary of Alan Shepard's first American spaceflight, the United States is at a turning point in space as the space shuttles are retiring and NASA is looking toward commercial spaceships for the future.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.