Auro­rae scat­tered over Mars

All About Space - - Mars Express -

Auro­rae usu­ally oc­cur when charged par­ti­cles from the so­lar wind col­lide with a planet’s at­mos­phere at the poles due to the na­ture of the planet’s mag­netic field. When Mars Ex­press first de­tected lo­calised auro­rae on Mars via the Spec­troscopy for the In­ves­ti­ga­tion of Char­ac­ter­is­tics of the At­mos­phere of Mars (SPICAM) in­stru­ment, it cast a new light.

Along with NASA’s Mars Global Sur­veyor, sci­en­tists de­duced that the Mar­tian crust pro­duces cusp-like mag­netic struc­tures ca­pa­ble of con­cen­trat­ing the ex­cited par­ti­cles in very small re­gions.

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