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Brewster Rockit by Tim Rickard for March 06, 2011
March 05, 2011
March 07, 2011
Mercury’s rotation period is 58 days, or 2/3 of a Mercurian year. However, a Mercurian solar day—the time from sunrise to sunrise, as viewed from the planet’s surface—is twice as long as a Mercurian year. Be careful to say what you mean by “day”, Prof.