Q:

How long does it take for light from the moon to reach the Earth?

A:

Quick Answer

It takes light from the moon's surface approximately 1.3 seconds to reach the Earth. This is also the amount of time it takes for sound to travel from the Earth to the moon. That means that communication from the Earth to an astronaut on the moon has a 2.6-second delay.

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Full Answer

The moon's distance from the Earth varies, but the average distance is approximately 240,000 miles. The sun is much further away at 93 million miles. It takes approximately 8.3 minutes for light from the sun to reach the Earth. In comparison, the sun's light takes roughly 5.5 hours to reach Jupiter.

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Related Questions

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    Why does the moon seem to change shape ?

    A:

    Sunlight reflects off the moon's surface, and it is seen at different angles from the Earth as the moon moves in orbit around the planet. These changes are known as lunar phases, which occur in a cycle that repeats every 29.5 days.

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    How does the moon affect the Earth?

    A:

    The main way the moon affects the Earth is the tides. The moon plays an important role in protecting the Earth from space rocks, such as meteorites. More subtle effects of the moon include minor effects on climate, the heat of the crust and the speed of the Earth's rotation.

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    How fast does the moon orbit the Earth?

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    The moon orbits the Earth at approximately 2,288 miles per hour and completes one full orbit every 27.322 days. Additionally, the moon takes approximately 27 days to complete one full rotation on its own axis, called its rotational period, which closely matches its orbit around Earth.

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    Is the moon bigger than the Earth?

    A:

    The moon is not bigger than the Earth as it has a diameter of approximately 2,159 square miles, which is about one-quarter of the size of Earth. In addition to being smaller than the Earth, the moon is much lighter. It weighs approximately 80 times less than Earth, but what it lacks in density, the moon makes up for in luminosity.

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