Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
The beautiful blue orb of Neptune is the eighth and farthest planet in our solar system from the sun. Thanks to Voyager 2 and the Hubble telescope, we can see Neptune as never before.
NASA's WISE infrared telescope reached its one-year anniversary in December. To celebrate, here are four new dazzling images of the scope's most recent observations.
Video: Missed the total lunar eclipse last night? With the help of a little video magic, watch it happen much faster.
Video: For the last 24 hours, speculation that NASA might announce that ET has finally phoned home went viral.
Jupiter is the largest planet in our solar system and fifth from the sun. Thanks to several missions by NASA, we're able to see our biggest neighbor as never before.
Surprising new results from the Large Hadron Collider rule out a number of theoretical physics models.
Attached with a camera, the paper airplane captured incredible video as it glided 90,000 feet above the planet.
Sky gazers carve out a spot in rural Georgia where the lights won't bother them.
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.
Video: Just how big is Earth in comparison to the Sun, stars and other planets?
The fourth planet from the sun, Mars is one of our closest neighbors in the solar system, and yet it remains a mystery.
Video: An airport in inner Mongolia reportedly shut down due to UFO sightings.
Some astrophysicists propose time will end in 5 billion years with an event no creature alive will witness.
Physicists have calculated that time is likely to end within the next 4 billion years due to a catastrophe that no one alive at the time will witness.
Video: Former U.S. Air Force personnel claim they experienced UFO activity near nuclear sites at which they worked.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.