For the first time the NASA Rover Perseverance captured from the surface of the red planet Le Green lights of aurorawhich illuminated the intero sky following the arrival of a CME (Expulsion of Coronal Massa) by the sun, that is, an expulsion of matter in the form of plasma. It was known that on Mars they were present of various types, but so far they have only been observed in invisible wavelengths for the human eye and only by vehicles in orbit around the planet, never from its surface. The event was described in the journal Science Advances by the research led by the University of Oslo.
“A’Green Aurora on Mars It has exactly the same color that it would have on earth, but it still appears completely different“Says Elise Knutsen, who coordinated the researchers.“ We are used to seeing a sort of tapes with a distinct shape, while the aurora on Mars is completely uniform: thewhole sky lights up green – says Knutsen – In all directions. “The authors of the study add that it will be interesting to find out what the first explorers who arrived on the planet will see, even if the phenomenon And very weak And the human eye does not distinguish the colors well in low light conditions.
The aurore occur when charged particles from the sun collide with the molecules present in the atmosphere of the planet. The Earth’s magnetic field channels most of these solar particles to the poles, that’s why on our planet the auror are generally limited to very high latitudes. Marshowever,, it no longer has a global magnetic field: for this reason, the ear auror on the red planet take on one completely different form And they tend to illuminate the whole sky. “This exciting discovery – says Knutsen – opens new possibilities for research on the ear”.
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