"Mud ball" meteorites - full of clays, organics and water - are unique among space rocks. And a lot of them fell in April 2019 on a small town in Costa Rica, much to the delight of scientists.

Late last month, the Curiosity rover picked up wonderful images of noctilucent - or "night-shining" - clouds in the Martian sky. Plus - if you're at a high latitude on Earth now - it's time to start looking for these clouds.

Will Elon Musk's plan to launch 12,000 Starlink satellites - aimed at bringing internet access to the world - interfere with astronomy? Astronomer Guy Ottewell ponders this question.

A hundred years ago today, Einstein’s theory of gravity was first put to the test when Arthur Eddington observed light “bending” around the sun during a solar eclipse. A century later, scientists are still searching for the limits of the theory.

Researchers estimate that if the massive ice deposits melted, they'd cover the planet in 5 feet (1.5 meters) of water.

A study of dust in the disk around the star HD 163296 suggests we're glimpsing a gravitational interaction between giant planets and much-smaller objects, the future asteroids and comets of this newly forming solar system.

Watch 2 Russian cosmonauts perform a spacewalk outside the International Space Station (ISS) on Wednesday, May 29.

Citizen scientists: NASA’s OSIRIS-REx mission needs your help choosing its sample collection site on asteroid Bennu ... and your extra eyes to look for whatever else might be interesting.

A new survey algorithm - called Transit Least-Squares - has just caused the number of known, rocky, Earth-sized worlds orbiting distant stars to grow again, as astronomers add another 18 exoplanets to the list.

It wasn't visible to the eye, but some telescope users in Earth's Southern Hemisphere caught it at its May 25 closest approach. Now Northern Hemisphere observers will get their chance. Charts here, and check out this cool video!