 Other atmospheric observations included a <unk> dark oval of high atmospheric @-@ haze , about the size of the Great Red Spot , near Jupiter 's north pole . <unk> imagery revealed aspects of circulation near the poles , with bands of globe @-@ <unk> winds , and adjacent bands moving in opposite directions . The same announcement also discussed the nature of Jupiter 's rings . Light scattering by particles in the rings showed the particles were irregularly shaped ( rather than spherical ) and likely originated as <unk> from <unk> impacts on Jupiter 's moons , probably on <unk> and <unk> . On December 19 , 2000 , the Cassini spacecraft captured a very @-@ low @-@ resolution image of the moon <unk> , but it was too distant to show any surface details . 
