Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Space-based solar power could be directed to multiple locations in the world, and wouldn't suffer from weather-related outages.
First, we took you from the Earth to the moon. Of course, NASA's rich history did not end with the final lunar steps of Apollo 17.
Launch of Discovery tentatively rescheduled for Nov. 30.
The EPOXI reached the Hartley 2 comet after a 2.5-year journey across the solar system, a distance of 2.9 billion miles.
The Discovery's final mission is taking longer than expected.
The book covers major questions about the nature and origin of the universe.
Launch windows rely on the angle of the sun, safety of astronauts.
Incoming bad weather could impact new launch date, may push launch to Nov. 7.
No need to sound the alarm when you see a bright light in the sky.
As NASA celebrates the 10th anniversary of astronauts living on the space station, the question is will it pay off?
Robonaut 2, or R2, is hitching a one-way ride to the International Space Station this week aboard the final flight of space shuttle Discovery.
The first of NASA's 3 shuttles facing retirement, was at the launch pad for the last time and prepared for liftoff on Wednesday.
Five of the six crewmembers were selected into the same astronaut training class.
Asteroid splashdown could release chemicals and elements into the atmosphere that would damage the ozone layer.
Enjoy this countdown of the top 10 ways living in space can be "scary."
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.