Astronomy:Vishniac (crater)

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Giantsfootprint 7n20 1969.jpg
Giant's Footprint
CoordinatesCoordinates: 76°42′S 276°06′W / 76.7°S 276.1°W / -76.7; -276.1
Diameter80.47 km (50 mi)
DiscovererMariner 7

Vishniac is the larger crater of the Martian surface feature called the Giant's Footprint. It was named after Wolf V. Vishniac, a microbiologist who died on an expedition to Antarctica. Fittingly, the crater lies in the Antarctic of Mars.[1] The feature was originally observed by Mariner 7 in 1969. In 1999, the Mars Global Surveyor's Mars Orbiter Camera was able to provide more detailed pictures.[2] The crater measures approximately 80.47 kilometres (50 mi) in diameter. Its name was approved by the International Astronomical Union in 1976.[3]


  1. Sagan, Carl (1980). Cosmos. New York: Random House, Inc.. p. 126. ISBN 0-394-50294-9. 
  2. Malin Space Science Systems (2000). "Return to "Giant's Footprint" 3 Decades After Mariner 7 Flyby". 
  3. "Vishniac (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.