Solar System

Happy Earth Day! Celebrate with these amazing photos of our planet from space, from Apollo 8 to Artemis 2

By Chelsea Gohd published 22 April 26

This Earth Day, we reflect on our home planet and look at Earth from space through history.

Celebrate Earth Day with this Artemis 2 shot | Space photo of the day for April 22, 2026

By Chelsea Gohd published 22 April 26

Celebrating Earth Day with an image of Earth captured by NASA's Artemis 2 mission around the moon.

Mysterious rings around Uranus point to hidden moons orbiting the ice giant

By Keith Cooper published 22 April 26

The two most puzzling rings around Uranus are gradually giving up their secrets, only to deepen the mystery of the Uranian system.

NASA's Curiosity rover finds building blocks of life on Mars. Scientists aren't sure how they got there

By Leonard David published 21 April 26

NASA's Curiosity rover has found a diverse mix of organic molecules on Mars, including chemicals considered building blocks for the origin of life on Earth.

Scientists found a 'bathtub ring' on Mars. Could it be evidence of an ancient Red Planet ocean?

By Charles Q. Choi published 20 April 26

A huge geological structure on Mars resembling a bathtub ring may be evidence of an ocean that once covered a third of the Red Planet.

A peek at the far side of the moon | Space photo of the day for April 20, 2026

By Chelsea Gohd published 20 April 26

The Artemis 2 astronauts captured a unique image of the moon's "dark side" during their historic April 2026 flyby.

This life-hunting rover may be SpaceX's 1st-ever Mars launch

By Mike Wall published 18 April 26

SpaceX will launch Europe's life-hunting Rosalind Franklin rover toward Mars in 2028 — but not aboard the company's Starship megarocket.

'Tall waves moving in slow motion': Here's how oily oceans on Saturn's giant moon Titan may behave

By Keith Cooper published 17 April 26

The size of waves on alien worlds will depend as much on the characteristics of the liquid as well as the gravity.

Interstellar invader comet 3I/ATLAS made a startling transformation as it passed the sun

By Robert Lea published 17 April 26

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.