Learn how Albert Einstein’s theory reveals that time on Mars runs faster than on Earth — and why that tiny shift matters for ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy ...

Clocks on the Red Planet run almost 500 microseconds faster per Earth day than they do here at home. This also has consequences for settlement plans.

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

With protruding appendages that each end in an orb, Solarion arienae vaguely resembles a cartoon Sun or a retrofuturistic ...

Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Ask someone on Earth for the time and they can give you an exact answer, thanks to our planet's intricate timekeeping system, ...

Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...

The picture-perfect launch of twin Escapade orbiters bound for Mars presages a fantastical new age in exploring the planets, ...

The brilliant moon illuminates our night sky again this week, reaching its full phase on Thursday, Dec. 4. All that extra light in the sky means that ...

For years, the center of our galaxy has been painted as a place where stars go to meet their end — a region ruled by Sagittarius A*, a black hole so massive that its gravity can stretch, tear, and ...

A first ever detection of a coronal mass ejection from a small red dwarf could have big consequences for life on any nearby ...