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Left:
Hubble Space Telescope image of part of the northern hemisphere
of Mars in April 1999, during the northern summer. The residual
north polar cap is visible at the top, and below and left of it
is a spiral storm feature, picked out by clouds of condensed water
vapour. Less obvious, lower altitude clouds mask the surface to
the south of this storm too.
Right: The spiral storm reprojected to show it as it would appear if seen from directly above. |
