Global dust storm on Mars

Two dramatically different faces of Mars, our Red Planet neighbour, appear in these comparison images showing how a global dust storm engulfed Mars with the onset of Martian spring in the southern hemisphere. When the ESA/NASA Hubble Space Telescope imaged Mars in June 2001, the seeds of the storm were caught brewing in the giant Hellas Basin (oval at 4 o'clock position on disk) and in another storm at the northern polar cap.