Previous landmark scientific discoveries like the Higgs boson provide a better template for what it will take to confirm whether aliens have made contact with Earth.

New simulations reveal that the moons of Uranus may retain traces of giant planets.

The detonation of the New Glenn rocket resulted in a huge fireball in Florida, and may have long-term implications for the company's ambitions.

The project’s first mission could arrive as soon as this year, with a little help from Blue Origin.

NASA took advantage of the recent close approach of the Psyche probe to Mars to calibrate its observation instruments.

There are black holes that are too big to be born from the death of a star but aren’t quite supermassive either. There’s finally evidence for where those came from.

Once dismissed as empty expanses between galaxies, cosmic voids are becoming one of the most promising tools for probing the universe’s biggest mysteries.

On May 18, an asteroid about the size of Chicago’s Cloud Gate will fly four times closer to Earth than the moon.

This is the first time NASA has encountered a situation like this, and it took nearly a week to resolve.

The Defense Department has released a new trove of declassified documents about government UFO sightings.

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.

Weirdly, spaceships have no direct way to gauge their own speed. Luckily, we can use some physics tricks to figure it out.

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.

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.

After traveling a greater distance from Earth than any humans before them, the astronauts of Artemis II have safely returned home.

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.

Splashdown for the Artemis II crew is scheduled for Friday evening, and NASA will livestream the historic homecoming.

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.

The first images from Artemis II reveal what the moon looks like just 7,000 km from the surface—and confirm that NASA is ready to return to Earth’s satellite.

Artemis II remains on course for its lunar flyby as the crew shares historic photos of Earth, tests key systems for future lunar missions, and attempts to fix the toilet.

The moon is not just a barren rock orbiting the Earth. The Artemis missions could answer the great unknowns that the satellite holds.

The astronauts will arrive about 10,300 kilometers beyond our satellite, breaking all previous records for distance from Earth. But how was their route chosen?

The crew of Artemis II will not descend to the moon, but their capsule will fly over the far side of its surface.

The Artemis II mission crew includes the first woman, the first Black person, and the first non-American astronaut to travel to the lunar environment.

Here’s everything you need to know about the Artemis II mission, the long-awaited (and long-delayed) human return to the moon.

The GPS Next-Generation Operational Control System was due for completion in 2016. Ten years later, the software for controlling the military’s GPS satellites still doesn’t work.

As soon as April 1, four people will embark on a journey that will take them farther from the Earth than anyone has ever traveled before.

Analysis of the tail of 3I/Atlas reveals that it contains an anomalous proportion of methanol, a class of alcohol used in fuels.

Donald Trump has ordered the release of files related to aliens, UAP, and UFOs. If previous disclosures are any indication, get ready for a letdown.

America’s journey back to the moon has run into a few missteps. NASA administrator Jared Isaacman is banking on a new approach.