Researchers thought Saturn's moon Enceladus had jet-like geysers. But the jets may be optical illusions, caused by looking through a "fold" in curtain-like geysers.
Earth's water likely came from asteroids and/or comets. New research suggests that small bodies in distant solar systems carry water to their planets, too.
Roscosmos said the craft "ceased to exist" over the Pacific. The final time of reentry is 9:20 p.m. CDT (02:20 UTC), with an accuracy of plus or minus 1 minute.
With five active spacecraft now orbiting the planet, NASA has beefed up its traffic monitoring to make sure the Mars orbiters don't get too close to each other.
Flight controllers at Goddard Space Flight Center completed a maneuver that lowered the spacecraft’s orbit to within 12 miles (20 km) of the moon's South Pole.
Galaxy EGS-zs8-1 sets a new distance record. It's so far away the light we receive left the galaxy over 13 billion years ago, and it is just arriving now.
Why do some supernovae produce gamma-ray bursts, while others don't? The answer may lie in the swirling disk - and powerful jets - that some supernovae leave behind.