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What defines one earth day?

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Anonymous

12y ago
Updated: 8/20/2019

24 hours, or a rotation of the Earth, depending on how you look at it.

Edit:

The Earth actually takes only about 23 hours and 56 minutes to rotate once.

But the Earth is also orbiting the Sun. The extra 4 minutes are needed to allow

for the effect of the Earth's orbiting on the apparent position of the Sun in the sky.

In fact 24 hours is called a "solar day", whilst the rotation time is a "sidereal day".

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Wiki User

12y ago

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