Early Observations and Naming
Olympus Mons and a few other volcanoes in the Tharsis region stand high enough to reach above the frequent Martian dust-storms recorded by telescopic observers as early as the 19th century. The astronomer Patrick Moore points out that Schiaparelli (1835–1910) "had found that his Nodus Gordis and Olympic Snow were almost the only features to be seen" during dust storms, and "guessed correctly that they must be high". The Mariner 9 spacecraft arrived in orbit around Mars in 1971 during a global dust-storm. The first objects to become visible as the dust began to settle, the tops of the Tharsis volcanoes, demonstrated that the altitude of these features greatly exceeded that of any mountain found on Earth, as astronomers expected. Afterward, astronomers adopted the name Olympus Mons for the albedo feature known as Nix Olympica.
Read more about this topic: Olympus Mons
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