Mars isn’t a bright, fire-engine red, but the iron oxide in its rocks makes it appear redder than other planets, especially ...

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

No one expected these glittering bits among the gray lunar dust back then. The beads, smaller than grains of sand, formed ...

On Mars, a surprise was hiding in plain sight. A tall mound near the edge of Jezero Crater turned out to be something ...

New James Webb Space Telescope data reveal Pluto's high-altitude haze is a key driver of the climate on the dwarf planet, ...

A spacecraft's-eye view over the landscapes of Mars has just given us a first-of-its-kind glimpse of the giant, ancient ...

Given just how big space is, the solar system seems like it shouldn't be too mysterious. But there are actually plenty of ...

The idea of terraforming Mars—essentially reshaping the planet to support Earth life—has captured imaginations for decades.