This dim constellation wasn't defined until 1930.
Over the course of 11 years, Stardust visited an asteroid and two comets and sent pieces of space matter back to Earth.
Although one of the twin spacecraft is no longer in contact with Earth, NASA's STEREO mission continues to provide insights about the sun.
Scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
Learn about planet Mars’ atmosphere, water supply and the possibility to support life, plus, findings from the Mars exploration rover mission.
The space shuttle Columbia broke up on Feb. 1, 2003, killing its seven-member crew. An investigation led to changes in NASA procedures.
Before their fiery demise, NASA's twin GRAIL spacecraft mapped the moon in a quest to learn more about our closest neighbor.
If the rays of the setting or rising sun hit the moon just right, the moon appears to turn red or ruddy-brown. This is called a blood moon.
The primary mission for NASA's Deep Space 1 was to test out a dozen new advanced technologies. During the spacecraft's ride through space, it also swung by an asteroid and a comet.