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If the Moon is gradually moving farther away from us, will it eventually go away?

The Moon is receding from the Earth, but will not continue to do so forever. We have to consider why the Moon is moving away at around 1.5 inches (3.78 cm) per year - a force is necessary to cause that.

The Moon exerts a tidal force on the Earth, causing a bulge. But, because the Earth rotates, that bulge is not directly between the Earth and Moon. It is slightly in front. That bulge has a gravitational pull on the Moon, causing it to move forward, slightly faster.

Causing the moon to move slightly faster results in it climbing very slowly to a higher orbit. The Moon climbs higher by about 3.78 cm, per year. But, since we just said that the force is gravitational and we know that gravity decreases with distance, we know that the force will also decrease with distance.

That means the rate at which the Moon recedes will decrease with time. But there’s more to it than that. A force acts upon both bodies. While the impact on the Moon is causing it to recede, the impact on the Earth is that it is being caused to slow its rotation. The day is getting longer.

Eventually, the length of the day will match the orbital period of the Moon. That means both bodies will be tidally locked - meaning the same part of the Earth will always face the same part of the Moon. And if that happens, there is no longer a leading bulge and thus no longer a force causing the Moon to move away.

This would happen when the orbital period of the Moon is about 47 days. That would put the Moon at a distance of about 550,000 km; less than half as far again as it is today. In other words, not very far.

However, it will take a long time for that to happen. In the meantime, the Sun will turn into a red giant and its outer layers will extend to where Mars is, today, meaning Earth, the Moon, and every In-N-Out restaurant will have been swallowed up and turned into loose atoms.


This information was taken from Quora. Click here to view the original post.

Did you know that the Moon is slowly moving away from the Earth?

#Science #Quora

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What are your thoughts on this subject?
36 Comments
Lynne Cage
Informative thnx
0
Mar 13, 2020 2:41AM
Todd Cates
👍
0
Mar 3, 2020 1:23PM
andrewsampson
Irma Rivera, so that was wrong again - another mistake by the people who wrote the Bible some 75 years after Jesus death!
0
Feb 10, 2020 4:32PM
andrewsampson
Olney Ford, Prophets we’re old drunk men wandering in the Dessert for 40 days and 40 Nights talking to God. You try it. You go walking in the Dessert for 40 days and 40 nights .... you’ll be talking to Elvis - I guarantee it!
0
Feb 10, 2020 4:30PM
Susan Golebiewski
Very scientific & interesting.
0
Feb 1, 2020 8:46PM
colleenmar
That is correct!! Satellites, SDO, SOHO, etc.have been measuring this for decades, so much for global warming, forget "the Green New Deal"! It is the way of the universe. We will not be around.
0
Dec 28, 2019 9:19PM
John McManus
Thats right-Cheer us all up, why dontcha?
2
Dec 25, 2019 4:19PM
Jim Rivera
Cycles. It's just part of celestial cycles.
0
Dec 14, 2019 11:27PM
Robert L Hutchison
Eventually, if the Moon moves farther away, both solar and lunar eclipses will not be as spectacular as they are now!
0
Nov 7, 2019 4:48PM
littledick
God gave Noah the rainbow sign, no more water, fire next time!
1
Nov 3, 2019 12:36AM
Brian Rowlandson
David Appleby, bet you are glad you were not a dinosaur. One of God's creations he no longer wanted.
0
Sep 21, 2019 4:50PM
Mary Lou Lauren
James The article mentioned that we won’t lose the moon. It may move a bit further away for awhile, which will take many, many years, but will come closer again.
0
Sep 19, 2019 2:30AM
Irma Rivera
The Bible mentioned that the moon will remain for ever in Psalms 89:37 " Like the moon it will be firmly established forever as a faithful witness in the sky"
1
Sep 2, 2019 4:30AM
James Klingenberg
We would be in trouble if we lost the Moon.
0
Aug 24, 2019 10:56PM
Bong Refuerzo
No more Moon River and top of these...The Moon Walk
0
Aug 2, 2019 8:27AM

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