Vishniac is a largest crater of the Martian

Mars

Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

 surface feature called the Giant's Footprint. It was named after Wolf V. Vishniac

Wolf V. Vishniac

Wolf V. Vishniac was an American microbiologist, son of Roman Vishniac. Educated at Brooklyn College and Stanford University, he was a professor of Biology at the University of Rochester. He died while on a research trip to the Antarctic while attempting to retrieve equipment down a crevice. The...

, a microbiologist

Microbiologist

A microbiologist is a scientist who works in the field of microbiology. Microbiologists study organisms called microbes. Microbes can take the form of bacteria, viruses, fungi, and protists...

 who died on an expedition to Antarctica. Fittingly, the crater lies in the Antarctic of Mars. The feature was originally observed by Mariner 7 in 1969. In 1999, the Mars Global Surveyor

Mars Global Surveyor

The Mars Global Surveyor was a US spacecraft developed by NASA's Jet Propulsion Laboratory and launched November 1996. It began the United States's return to Mars after a 10-year absence. It completed its primary mission in January 2001 and was in its third extended mission phase when, on 2...

's Mars Orbiter Camera

Mars Orbiter Camera

The Mars Orbiter Camera or Mars Observer Camera was a scientific instrument on board the Mars Observer and Mars Global Surveyor spacecrafts...

was able to provide more detailed pictures.