From causing muscle loss to raising the risk of blood clots, long-haul space missions can have a profound impact on the human ...

Solar storms are dangerous for future Mars astronauts. Predicting aurora helps warn about incoming radiation bursts.

NASA scientists discover strong new evidence that Mars may have once supported life, much as Earth does today.

A hunk of speckled mudstone, sitting in a barren wasteland 215 million miles from Earth, might just be the most important ...

Jupiter is a gas giant and doesn’t have a solid outer surface like Earth. But astronomers can still assess its shape by ...

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Federal funding is about to run out for 19 active space missions studying Earth's climate, exploring the Solar System, and probing mysteries of the Universe.

Have you ever looked up at the Kintyre night sky and wondered if a particularly bright star you noticed was actually a planet ...

A biosignature is any characteristic, element, molecule, substance or feature that serves as evidence for past or present ...

Signs of 'life remnants' on Mars: Perseverance rover discovers historic biological markers ...

Minerals in the rock might have been produced by microbes in chemical reactions, but researchers say they’ll need to examine the sample more closely to know for sure ...