Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick ...

Determining the size of an Earth-size exoplanet by the amount of starlight it blocks hundreds of light-years away once was the realm of science fiction. Measuring the mass of such a small planet based ...

A NASA mission will send twin spacecraft to Mars to learn what happened to the Red Planet's ancient, thick atmosphere.

(CNN) — Hundreds of basketball-size space rocks slam into Mars each year, leaving behind impact craters and causing rumblings across the red planet, according to new research. Mission planners could ...

Mars is an inhospitable desert planet. Billions of years ago, things were different. In Jezero Crater, for example, fed by a vast river delta, there was probably a considerable body of water roughly ...

NASA’s Mars rover collected rock samples that could reveal if the planet once hosted life. Here’s what scientists plan to do ...

The Tianwen-1 orbiter successfully imaged the object from a remarkable distance of approximately 30 million kilometers as it ...

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