Mars' north polar cap
March 20, 2003
Mariner 9 image of the north polar cap of Mars. The image was taken on 12 October 1972, about one-half Martian month after summer solstice, at which time the cap had reached its minimal extent.
Topics: Environment, Astronomy, Spacecraft, Space exploration, Summer solstice, Mariner 9, Polar ice cap, Climate of Mars, Solstice, Exploration of Mars, Mars