Monday, October 12, 2009

Flash Facts: Mercury's Orbit

"Because Mercury orbits about the sun once every 88 days at an average speed of 29.8 miles a second--as contrasted with the Earth's 365 1/4 days at 18 1/2 miles a second--the two planets return to the same relative positions every 116 days."

Issue: The Flash #113 (June-July 1960)

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