On August 14, gravitational wave detectors in the US and Italy sensed ripples in space-time. Data analysis suggests they came from a black hole engulfing a neutron star, 900 million light-years from Earth. If so ... it's a first-ever detection by earthly scientists.

"Nieves penitentes" is Spanish for "penitent-shaped snows." These ice structures form in extreme conditions of high elevation, high solar radiation, low humidity, and dry winds.

On tall ice structures high in the Chilean Andes, researchers found algae growing on snow. They don’t entirely understand how the algae are able to bloom.

New analyses of Saturn's rings reveal how and when they were made, from what, and whether they'll last.

For the first time, heavy metal gases like magnesium and iron have been detected floating away from an exoplanet, a planet orbiting a distant sun. Why? Because the planet - which is about as big as Jupiter - is orbiting perilously close to its star.

Arecibo in Puerto Rico was completed in 1963. In recent years, it has weathered multiple hurricanes. The emergency supplemental funds - supported by the U.S. Congress - represent an investment in the future of this large, famous and much-loved radio dish.

Learn what it would be like to travel to Chile - sometimes called astronomy's world capital - in this final report from Robert Pettengill with the Astronomy in Chile Educator Ambassador Program. Thank you for your dispatches, Rob!

Perseid meteor shower 2019 over Scandinavia's 1st dark sky park, the island of Møn in Denmark.

This year's Gulf of Mexico dead zone of oxygen-depleted waters is the 8th largest ever recorded.

The August 9-12 weather event in Australia was one of the longest cold stretches and greatest snowfall totals so far in this century, according to climate and atmospheric scientists.