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Scientists think a new framework for quantum gravity could offer clues about a mysterious 5th fundamental force of nature.

Here's where and when to see the 'ring of fire' annular solar eclipse on Feb. 6, 2027

A coronal mass ejection is currently racing toward Earth and could trigger G2 to G3 geomagnetic storm conditions on June 8, potentially boosting aurora displays across northern latitudes.

Searing across the night sky, a meteor puts on a spectacular show above Arizona's Kitt Peak National Observatory.

From urban beaches and hidden capes to lighthouses and mountain peaks, here's where to see the total solar eclipse on Aug. 12, 2026, if you're on Spain's east coast or in the Balearic Islands.

Stories of NASA and Apollo have passed into folklore, but the equivalent stories from the other side of the Iron Curtain have often been shrouded in secrecy.

The U.S. Federal Aviation Administration has declared the debut flight of SpaceX's Starship V3 vehicle a mishap and is requiring an investigation before the megarocket can fly again.

Satellites captured footage of an underwater volcano eruption in a part of the sea that remains largely a mystery.

Scientists are exploring how lasers stabilized in the moon's coldest, darkest craters could enable a GPS-like network to help future Artemis astronauts and spacecraft navigate the lunar surface with far greater precision.

Much of the UFO imagery that the Pentagon released last week was new, but we've known for decades about the odd things that the Apollo astronauts saw on and around the moon.

NASA is testing the limits of future Mars aircraft as it works to develop a next-generation fleet of helicopters that will fly through the thin atmosphere of the Red Planet.

ESA's Mars Express orbiter captured dramatic new views of a rugged Martian landscape shaped by catastrophic floods billions of years ago.

A mockup of Blue Origin's Blue Moon Mark 2 lunar lander has been assembled at the Johnson Space Center, and is ready for Artemis astronauts to come aboard to begin training.

You could spend hours scrolling through the thousands of photos just released by NASA from the Artemis 2 moon mission.

Russia launched its Soyuz 5 medium-lift rocket for the first time ever on Thursday (April 30), and things apparently went well.

"That moment of completion was incredibly rewarding, as I felt like I had finally represented the first quarter moon as it might appear in person."