The universe

Chile and Cyprus have signed the Artemis Accords, bringing the number of nations in the moon-exploration coalition to 47.

Soil-like pebbles in moon samples brought home by Apollo 16 astronauts have revealed new details about lunar history.

A recent satellite image captured the reemergence of a unique, UFO-like cloud, known as the "Taieri Pet," which appears above New Zealand's South Island when conditions are just right.

Lakes appearing in the Sahara desert captured in satellite images after a cyclone dumped a years' worth of rain on northern Africa in just a few days.

The comet's dust trail was more visible in a Navy space telescope than any other.

To see the Crab Nebula for yourself, you'll have to wait until around midnight local daylight time, after it has sufficiently risen high enough above the east-northeast horizon.

The destructive power of asteroids is undeniable — just ask the dinosaurs. New research suggests a huge space rock that struck Earth over 3 billion years ago may have benefitted early life.

A new video shows how Earth's magnetic field weakened and warped before temporarily flipping during a recent "polar reversal event."

An illustration of a cosmic airburst event.

Deep in the heart of the massive Perseus cluster, giant galaxies stir, stars are torn from their homes and hot gas radiates at more than 1 million degrees Celsius.