Keith Cooper

A Japanese poet wrote in his diary that "red lights" appeared in the sky over Kyoto. An analysis of tree rings suggests a powerful solar storm created the sight.

Thanks to the James Webb Space Telescope, astronomers have witnessed a cloudy morning dissipating to leave a clear sky by dusk on a distant hot Jupiter.

Plotting the optimal trajectory to visit multiple asteroids is a fiendishly difficult take on the Traveling Salesperson problem, but a new mathematical approach has succeeded in solving it.

If the new Vera C. Rubin Observatory had begun its science validation phase a few weeks earlier, it might have been up and running in time to discover 3I/ATLAS first.

Scientists say amino acids produced by life are distributed differently and more diversely than amino acids produced by non-living chemical reactions, thereby providing a truer signature of life.

A 3,700-mile-long cloud bank on Venus forms through the same phenomenon that describes how water spreads out in your kitchen sink, scientists say.

Dante's description of the fall of Lucifer to Earth from heaven seems to sport many of the hallmarks of an impact, forming a multi-ringed crater with a central peak.

The TOI-1130 system features a rare example of a hot Jupiter exoplanet joined by another world rather than being on its own.

Mexico City is one of the fastest subsiding cities in the world, dropping by up to 14 inches every year.

A trans-Neptunian object was found to possess a surprising thin atmosphere after astronomers witnessed the object occult a distant star.

A prototype ion engine that uses lithium metal vapor as a propellant has aced its first tests, achieving 25 times more power than the ion engine on the Psyche mission.

The Vela Supercluster, in our Milky Way's Zone of Avoidance, is competing gravitationally with other superclusters for the attention of local galaxies.

Evidence suggests that Venus is still volcanically active, and new data about a big eruption in Hawaii a few years ago could help scientists find out for sure.

Finding X-rays coming from one of the little red dots discovered by the James Webb Space Telescope could be the key to answering what these weird objects truly are.

Astronomers have found the boundary of star formation in the Milky Way's spiral disk — and it's not as far out from the center of our galaxy as you might imagine.

"These measurements vastly expand our understanding of how stellar neighborhoods like our own are built."

This latest image from Hubble forms just one of more than 1.7 million observations that the space telescope has made over the past 36 years since it launched on April 24, 1990.

New images from the Mars Express spacecraft show ancient volcanic ash spreading across the Red Planet.

The two most puzzling rings around Uranus are gradually giving up their secrets, only to deepen the mystery of the Uranian system.

The size of waves on alien worlds will depend as much on the characteristics of the liquid as well as the gravity.

Things are gearing up in the development of the Giant Magellan Telescope in Chile, as its developers enter the final design phase before the project goes before Congress for funding.

The star is escaping the Large Magellanic Cloud for the Milky Way.

New research shows that craters near the moon's south pole that have been in permanent shadow the longest are more likely to contain the most water ice.

Artemis 2's Orion capsule will hit Earth's atmosphere at nearly 24,000 mph on April 10. A heat shield and 11 parachutes will help it survive the fiery trip and splash down safely.

Plans are in place for the crew of Artemis 2 to try to replicate one of the most famous images ever taken from space — Apollo 8's shot of Earth rising over the moon's horizon.