Two decades' worth of Antarctic research reveals 5,200 tons of extraterrestrial dust lands on Earth each year.
NASA's long-serving Hubble Space Telescope is seeing double after detecting two rare pairs of quasars nestled within galactic collisions that occurred 10 billion years ago.
Reference The Quadrantid meteor shower peaks on January 3-4 and is active between Dec. 28 and Jan. 12. Our guide tells you how and where you can see the Quadrantid display.
Reference The Ursid meteor shower will peak on Dec. 22-23 and is active between Dec. 17-26. Our guide tells you how and where you can spot the Ursid display.
On Dec. 7, 1972, NASA launched its last Apollo mission to the moon: Apollo 17. See photos from the historic mission here.
On April 16, 1972 NASA launched the Apollo 16 moon landing mission, which sent three astronauts to the moon's Descartes region. See photos from the historic flight in our gallery here.
Reference Explore all 14 of Neptune's moons along with their names and dates of discovery. The Neptunian system hosts some very strange and elusive moons.
On Feb. 1, 2003, NASA's space shuttle Columbia broke up during re-entry, killing all astronauts onboard. Here we take a look at photos from Columbia's final mission, STS-107.