Q:

How long is a moon day?

A:

Quick Answer

According to NASA, one moon day is equal to 27 Earth days, which is the time the moon takes to complete its spin. The moon is tidally locked, so it always shows the same face to the Earth.

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How long is a moon day?
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Full Answer

The moon orbits the Earth at a distance of about 239,000 miles. It is rocky and has a solid surface. The craters and pits on the moon are a result of impacts. According to NASA, the surface features that create the face known as the “man in the moon” are the result of impact basins on the moon with dark basalt rocks.

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Related Questions

  • Q:

    Why is only one side of the Moon called the dark side of the Moon?

    A:

    The Moon rotates on its axis and so has day and night much like the Earth does. However, the period of the Moon's rotation and its orbit around the Earth take the same amount of time, so the near side of the Moon is always facing the Earth. The far side, or "dark" side, is never visible from the Earth's surface.

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  • Q:

    How long is the lunar cycle?

    A:

    The lunar cycle lasts slightly over 27 Earth days, or the same amount of time it takes the moon to complete one orbit around the Earth and complete one lunar day. The phases of the lunar cycle change based upon the moon's location along its orbit.

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  • Q:

    Why is the moon important?

    A:

    Most people know that the moon's gravitational influence has an effect on the tides on Earth, but some scientists also believe that the presence of the moon played an important role in making Earth habitable to begin with. The interplay between the Earth and the moon mirrors events that occurred throughout the early solar system, as a Mars-sized object may have hit the Earth, sending some of the mantle into orbit that soon cooled into the moon. Over time, the relationship between the Earth and the moon may well have assisted the advent of life.

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  • Q:

    How big is the moon?

    A:

    Earth's sole natural satellite, the moon, has a circumference of 6,783.5 miles around its equator. Its surface area is 14,647,439.75 square miles, which is approximately 0.07 times that of the Earth.

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