Mars: The northern polar cap			7.1a
			The northern polar cap of Mars during local summer when it was at its minimum extent, as seen by the Viking orbiters. The view is about 700 km across.
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Image Credit: NASA
The northern polar cap of Mars during local summer when it was at its minimum extent, as seen by the Viking orbiters. The view is about 700 km across.		Mars digital-image mosaic merged with colour of the MC- 1 quadrangle, Mare Boreum region of Mars. The central part is covered by a residual ice cap that is cut by spiral-patterned troughs exposing layered terrain. The cap is surrounded by broad flat plains and large dune fields. (Catalog #: PIA00161)
		text credits: (top & left) David A. Rothery (above) U.S. Geological Survey	Return to top of page