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.
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.