Astronomy

Salty glaciers discovered in craters near Mercury's north pole may have the right conditions for extreme forms of life, new research suggests.

A distant comet trapped in orbit between Saturn and Uranus is accompanied by a transforming disk of icy dust, new observations reveal.

New research finds that solar storms vary in strength over surprisingly short distances, and the current network of sensors may not be enough to properly prepare for future outbursts.

Our best observations can't come up with a single answer for how quickly the universe is expanding. Maybe that's because our galaxy is at the center of a giant void.

Rarely seen orange auroras, which technically shouldn't exist, were recently photographed in the sky above Scotland after an explosive solar storm smashed into Earth.

The massive planet LHS 3154b orbits a star much smaller than Earth's sun, and its discovery could upend everything we think we know about how solar systems form.

After months of meticulous planning, NASA's Odyssey Orbiter finally captured a unique view of the Red Planet's horizon, which is similar to what future Martian astronauts might see.

A recent solar explosion that almost reached "X-class" status has hurled a massive coronal mass ejection toward Earth, which will likely hit our planet and trigger a geomagnetic storm on Dec. 1.

With the solar cycle set to peak earlier than predicted, the sun's corona should look its spectacular spiky best for April 8's total solar eclipse.

Earth will become too hot to handle in a billion years. There's a (very) remote chance a passing star could save us by knocking our planet back into the habitable zone.