Ocean Moons, Promising Targets in Search for Alien Life, Could Be Dead Inside
The interiors of Europa and other watery moons in the outer solar system might be too geologically inactive to support life
Stories by Meghan Bartels
New Gravitational-Wave Detections Include Largest, Most Distant Black Hole Crash Ever
The four fresh signals from merging black holes hint at a forthcoming data deluge from the LIGO and Virgo observatories
Scientists Spot Giant Crater Hidden under Greenland's Ice
The enormous crater is among the 25 largest known on Earth, and likely came from a meteorite impact within the past three million years
Election Day 2018 Takes Absentee Ballots to the Extreme in Space
Even on the International Space Station, American astronauts manage to vote
NASA's Dawn Mission Ends, but Its Legacy Lives On
After visiting not one but two destinations in the Asteroid Belt, the interplanetary probe at last ran out of fuel
Soyuz Rocket Fails, Forces Emergency Landing for U.S.–Russian Space Station Crew
The accident occurred during the rocket’s ascent from the launch pad, allowing an abort system to jettison the crew to safety
Cassini's Death Dive into Saturn Reveals Weird Ring "Rain" and More
The spacecraft’s final observations are turning up a wealth of bizarre, unexpected phenomena
Space Station Leak May Have Been Caused by Human Error, Russian Reports Say
A small hole in a docked Soyuz spacecraft appears to have come from within, perhaps due to drillwork
To Find Alien Life, NASA Needs Bigger, Bolder Exoplanet-Hunting Telescopes
A new, prestigious report charts an ambitious future for the space agency’s burgeoning search for Earth 2.0
Meteorites May Have Created Some of Earth's Oldest Rocks
A barrage of impacts more than four billion years ago is linked to ancient stones found in Canada
To Fight Fake News, SETI Researchers Update Alien-Detection Scale
Dubbed Rio 2.0, the scale seeks to measure how important any potential signal from aliens might be
