Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
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.
Video: Photographer Terje Sorgjerd speaks about the week he spent capturing amazing pictures and video of the Northern Lights.
Long before the first lunar landing, dogs, chimps and monkeys flew beyond our atmosphere to test the influence of space on living organisms.
What on Earth? These photos give a small glimpse of the captivating beauty of our planet.
Black holes are some of the most mysterious objects in the universe — what is left behind after a star has collapsed. NASA has compiled several dramatic images of what are believed to be black holes in space.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.