The above image shows a 20-meter-long chunk of frozen carbon dioxide falling off a cliff. Rising temperatures during the ...

Noctilucent clouds on Earth are something quite spectacular, thin structures so high that they can still catch sunlight long ...

Formations that look like jumbo-sized kidney beans (or blobs of chocolate syrup, depending on your palette) may be indicators ...

The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

To solve that problem, a team of German researchers at the Technical University in Berlin figured that, instead of having a ...

Mars has northern and southern hemispheres like Earth, but their defining characteristics are markedly different, a phenomenon known as Martian dichotomy. The Southern Highlands are older ...

NASA is working on a groundbreaking nuclear electric propulsion system that could dramatically speed up trips to Mars. The ...

Musk has long envisioned colonists on Mars. This seems like a fever dream, but it recently featured in Trump’s inaugural ...

A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.

While robotic missions have returned samples from the moon and space rocks like asteroids, a successful Mars mission would mark the first time that rocks from another planet made it back to Earth.

Extraplanetary spacefaring has a hoary history in science fiction. Elon Musk, our so-touted Mars visionary, is an avid sci-fi ...