Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Phone will launch with a SpaceLab app to aid astronauts with experiments. Earth-bound iPhone users can download the app for 99 cents.
The Dawn spacecraft launched in 1997 and is just now reaching Vesta, a small protoplanet in the asteroid belt between Mars and Jupiter.
Check out eight amazing photos of our solar system's tiniest planet, Mercury.
Video: Shuttle Endeavour touched down safely at the Kennedy Space Center early Wednesday morning, completing its final mission to space.
Video: Astrophysicist is using 3-D images generated by a supercomputer to understand what happens with a supernova explodes.
Scientists take a census of 20,000 galaxies and find that only four percent resemble the Milky Way.
Video: Commanded by astronaut Mark Kelly, the husband of wounded congresswoman Gabrielle Giffords, the shuttle Endeavour embarks on its final journey into space before being retired.
Luckily the black holes are so small that they would take longer than the age of the universe to swallow the Earth whole.
The sun is the center of all life and energy for Earth. Check out these incredible images of the sun taken by NASA.
Video: NBC space expert James Oberg discusses the next phase in U.S. space exploration after NASA retires the shuttle program in June.
Video: Watch an incredible time-lapse of the Milky Way shot from El Teide, Spain's highest mountain.
Scientists have replicated the physics of the Big Bang by observing the way light moves through a special 'metamaterial,' with surprising results.
Real-life 'X-Files' reveal policy of destroying documents related to UFO investigations because they would have taken up too much filing space.
Learn more about the blue-green planet that is four times as large as Earth and is covered by methane gas clouds.
Video: Cosmonaut Yuri Gagarin's first orbital flight made history in 1961 and set the pace for the U.S.-Soviet space race.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.