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A European Mars orbiter spotted barcode-like dust streaks on the slopes of Apollinaris Mons, revealing how tiny avalanches help drive the Red Planet's massive dust cycle.

The X5.1-class eruption from sunspot AR4274 is this year's most powerful solar flare and Earth is in the firing line.

"I felt like it was time to give the Gemini program its due. It was an opportunity not to be missed."

This image captures Comet Lemmon in dramatic fashion, its bright coma and faint tail arcing across the starfield.

Quantum gravity seeks to unify the theory of general relativity with quantum physics to describe how gravity works at very small scales. But there's a big puzzle surrounding the idea.

On Nov. 11, 1966, the Gemini 12 mission launched.

Follow Space.com's rocket launch blog for the latest on when the next rocket launch will be and how to follow it live.

China's decision to delay the return of its Shenzhou 20 astronauts due to a possible space debris impact has led to discussion of space rescue planning — or lack of it.

Auroras may be visible from Alaska to Indiana as two incoming coronal mass ejections could spark geomagnetic storm conditions overnight.

Find out what you can see in the night sky for tonight, from planets and stars to dazzling meteor showers.