Snow dots the Martian landscape in these images from ESA's Mars Express orbiter and NASA's Mars Reconnaissance Orbiter.

Engaging articles, breathtaking images and expert knowledge Issues delivered straight to your door ...

There's a disturbingly sinister presence peering from a dark nebulous realm in the season finale of HBO's " Dune: Prophecy ," ...

Fans of HBO/Max's absorbing "Dune" prequel spinoff, " Dune: Prophecy " just got an early holiday gift with word that HBO has ...

Skywatchers across the United States witnessed a total solar eclipse, SpaceX caught a giant rocket out of mid-air with a pair ...

The daring NASA spacecraft made its closest-ever approach to the sun at 6:53 a.m. EST (1153 GMT) on Christmas Eve (Dec. 24).

Aurora chasers are on high alert for minor geomagnetic storm conditions on Dec. 25. Northern lights could be visible over ...

To start, there are the usual suspects, like electrons, protons, quarks and neutrinos. But if those particles aren't strange ...

A brilliant fireball lit up the night sky over some southern states in the United States this weekend, but that was no meteor ...

Our sun is far from the flawless orb of light we see in the sky. Spacecraft observations have long shown that, up close, the ...

An object that orbits in the space between Jupiter and Neptune has chemistry that could tell us more about the birth of the ...

"I think of JuMBOs as a cross between stars and brown dwarfs - they would have been like stars had it not been for the radiation from the more massive stars, which has sculpted them to be more like ...