In a celestial event known as a great alignment the five planets will be discernible with the naked eye, but to see Neptune ...

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

Learn about the new perspective on Earth's reduction of moderately volatile elements, a discovery made possible by meteorites ...

Mars spacecraft teamed up with an AI model to find a new impact crater on on the Martian surface, changing our understanding of the interior.

"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

The image below, taken by the European Space Agency's Trace Gas Orbiter (which arrived at Mars in 2016), shows one of the ...

New research shows that meteoroid impacts on Mars generate seismic signals that travel much deeper than previously thought, ...

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

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Humans are inching closer to living beyond Earth, but sustaining life on the moon or Mars requires a critical resource: water ...

Earth is home to some truly bizarre and breathtaking landscapes — here are 20 that look straight out of an alien world.

Understanding where Earth's essential elements came from—and why some are missing—has long puzzled scientists. Now, a new ...