NASA Mars rover snaps creepy view of the dark Martian sky

NASA's car-sized Perseverance rover is vigilantly sleuthing the Martian surface for past signs of life. It also snaps wondrous views of the planet's extraterrestrial skies.

The space agency released an eerie view of the dark Mars sky this week. It's gloomy, just before sunrise. Martian clouds hang in the air. Sunlight illuminates the distant atmosphere. It could be a view on Earth. But it's a vista tens of millions of miles away.

"Dusty and cold, sure – but Mars has a certain, raw beauty," NASA tweeted.

SEE ALSO: Life below Martian surface is more plausible than ever, scientists find

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Such high Martian clouds are often made of water ice, though they can be carbon dioxide clouds, too.

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The Perseverance rover is currently rumbling through the Jezero Crater, home to a dried-up river delta and a place planetary scientists believe once hosted a lake. "This delta is one of the best locations on Mars for the rover to look for signs of past microscopic life," NASA said.

As Mars, once a wet world harboring oceans, began to dry up, microscopic life might have persisted in Jezero's moist clays and soil. If so, it's possible remnants of organic material — potentially evidence of past life — may have been left over or preserved. Such remnants could be an element, or a substance, or a chain of molecules. The Perseverance rover has indeed found organic materials, like carbon, in the Jezero crater – but this itself isn't nearly evidence of past life.

The bar for claiming evidence of life is extremely high, and will almost certainly mean scrutinizing actual samples from Mars. That's one reason why the rover has drilled into the Martian soil to collect tubes of extraterrestrial dirt. In the next decade, NASA plans to bring these samples back to Earth.

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For now, the Perseverance rover continues traveling — noisily — across the Martain desert as its advanced chemical-sleuthing instruments sniff out the terrain. Its side-kick, the dusty Ingenuity helicopter, is helping NASA chart the rover's winding course.