The Pentagon Releases New Trove of Declassified UFO Files
The Defense Department has released a new trove of declassified documents about government UFO sightings.
How to Watch the 2026 Lyrids Meteor Shower at Its Peak
Between the night of April 21 and the early morning of April 22, those looking in the right place will see the sky light up with 15 to 20 meteors per hour.
How Can Astronauts Tell How Fast They’re Going?
Weirdly, spaceships have no direct way to gauge their own speed. Luckily, we can use some physics tricks to figure it out.
NASA Wants to Put Nuclear Reactors on the Moon
The White House has announced that NASA will work with the Departments of Defense and Energy to put nuclear reactors in orbit and on the surface of the moon.
NASA Wants to Put Nuclear Reactors on the Moon
The White House has announced that NASA will work with the Departments of Defense and Energy to put nuclear reactors in orbit and on the surface of the moon.
The Caves That Could Help Us Find, or Become, Aliens
From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet.
Artemis II Returns From Historic Flight Around the Moon
After traveling a greater distance from Earth than any humans before them, the astronauts of Artemis II have safely returned home.
The Future of the Artemis Program Is Riding on Reentry
Entire space programs have been canceled after a failure in the reentry phase. In the final test for Artemis II, astronauts will travel at 32 times the speed of sound as they return from the moon.
How and When to Watch the Artemis II Mission’s Return to Earth
Splashdown for the Artemis II crew is scheduled for Friday evening, and NASA will livestream the historic homecoming.
Artemis II Astronauts Witnessed 6 Meteorites Colliding With the Moon
The moon gets hit by space debris all the time, but some of it is so large that the impact generates light that can be seen thousands of kilometers away.