The most abundant meteorites found in Antarctica are called chondrites. They are some of the oldest objects known in the solar system. Katherine Joy/Antarctic Search for Meteorites Program / Case Western Reserve University hide caption

itoggle caption Katherine Joy/Antarctic Search for Meteorites Program / Case Western Reserve University

Never mind holiday stress. Steer clear of black holes, or risk "spaghettification" — or worse. Katherine Streeter for NPR hide caption

itoggle caption Katherine Streeter for NPR

The iconic "Earthrise" photo taken by astronaut Bill Anders through a window on the Apollo 8 command module on Dec. 24, 1968. Bill Anders/NASA hide caption

itoggle caption Bill Anders/NASA

NASA astronaut Chris Cassidy performs a spacewalk in May to inspect and replace a pump controller box on the International Space Station. On Saturday, two astronauts will perform the first in a series of similar spacewalks to fix a broken cooling line on the ISS. AP hide caption

itoggle caption AP

An image showing the distribution of massive stars in the new study. Our location within the Galaxy is circled in black. J. Urquhart et al./Background image by Robert Hurt of the Spitzer Science Center. hide caption

itoggle caption J. Urquhart et al./Background image by Robert Hurt of the Spitzer Science Center.