• Ronald Greely


It is no wonder that the planet Mars is named for the Roman God of War. Its bright, blood-red color is in stark contrast to the night sky and must have inspired visions of battle to ancient observers. In the last hundred years or so, the Red Planet, like Venus, has evoked speculations on bizarre lifeforms, advanced civilizations, and Earthlike climates ranging from cold and wet to hot and dry.


Impact Crater Shield Volcano Outflow Channel Viking Orbiter Crater Count 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© R. Greeley 1994

Authors and Affiliations

  • Ronald Greely

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