= Mark R. Showalter
{wiki=Mark_R._Showalter}
Mark R. Showalter is an American astronomer known for his work in planetary science, particularly in the study of the outer planets and their moons. He is associated with NASA's Ames Research Center and has been involved in various space missions, including the study of Saturn and its moons using data from the Cassini mission. Showalter is credited with the discovery of several moons of Saturn and has made significant contributions to the understanding of planetary ring systems.
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