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NASA rover discovers first ruby-like crystals on MarsAstronomers have detected small, ruby-like crystals embedded in Martian rocks, which may also hide sapphires created in the fury of meteorite impacts.
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An anomaly in Mars' mantle could trigger volcanoes to erupt — and may be causing the whole planet to spin fasterData from NASA's InSight mission suggests the Red Planet's Tharsis region is more active than previously thought and may be why Mars is spinning more quickly over time.
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Scientists tracked faint signals from the stars — and may have turned up hundreds of undiscovered planetsA new study shows that stars with low magnetic activity are likely to support exoplanetary systems, making the hunt for these celestial objects less random.
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Giant string of organic molecules on Mars may be one of the best signs of life yetA new NASA analysis concludes that it is "reasonable to hypothesize" that living things could have formed the odd organic molecules discovered on Mars.
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Giant 'spiderwebs' on Mars contain tiny egg-like structures that scientists 'can't quite explain,' NASA rover revealsNew photos captured by NASA's Curiosity rover show that Mars' giant, spiderweb-like "boxwork" features are covered in tiny, never-before-seen nodules that bear a striking resemblance to arachnid eggs. And researchers are struggling to explain them.
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Rare 'planetary parade' will return to the evening sky this weekSix planets will shine together in the evening sky on Feb. 28. Here's how to get the best view before they disappear.
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Saturn's largest moon may actually be 2 moons in 1 — and helped birth the planet's iconic ringsA new study hints that Saturn's largest moon, Titan, was created around 400 million years ago, when two massive moons smashed into each other. This hypothesis could also help to solve several other mysteries surrounding other moons and the planet's iconic rings.
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How long do most planets last?Planets are born, and they can also "die." So what's the lifespan of a typical planet?
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Strange rocky world found lurking on the edge of 'inside out' planetary systemAstronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.
