... 2002 February 19 . Water-Ice Imaged in Martian Polar Cap . Credit: MSSS , JPL , NASA . ... Views of this potentially life-enabling water-ice are usually obscured -- in the winter by darkness and in the summer by clouds ...
... Explanation: Like cosmic snowballs, fluffy comet-like objects the size of houses and composed mostly of water-ice, may be pummeling planet Earth 5 to 30 times a minute. ...
... Explanation: Dwarfed by Olympus Mons and the other immense shield volcanos on Mars , Apollinaris Patera rises only 3 miles or so into the thin martian atmosphere, but bright water-ice clouds can be still be seen hovering around its summit. ...
... Small areas of brightest terrain might arise from ice-volcanoes and have a high amount of reflective frozen water-ice . ... Rhea is composed mostly of water-ice but is thought to have a small rocky core. ...
... Recent images from the other orbiter, Mars Odyssey , have bolstered the hypothesis that a significant amount of water-ice lies beneath the surface near the Martian South Pole . ...
... Evidence that the above-imaged plates really are dust-covered water-ice includes a similarity in appearance to ice blocks off Earth's Antarctica , nearby surface fractures from which underground water could have flowed, and the shallow depth of the ...