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The Moon

What would happen if there were no moon?


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Answered 2016-11-19 12:51:57

It's in the details ...

The most immediate effect (other than the lack of moonlight, of course) would be on the Earth's tides. With only the Sun's gravitational influence, the difference between high and low tides would be reduced dramatically - as would tidal drag, which slows the Earth down at a rate adding about 0.002 seconds to the length of a day each century. Long term, the effects would be far more serious. The climate of the Earth is sensitively dependent on the 23.5° tilt of the Earth's axis, and without the stabilising presence of our relatively huge Moon, the gravity of the other planets would produce big changes in this angle - as it does with Mars, whose tilt changes by 60° over a few million years ...

If we had no moon the Earth would be unstable and would wobble on its axis, the moon's gravitational pull helps the earth stay stable.

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