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Necessary conditions to make the moon fall an Earth

Necessary conditions to make the moon fall an Earth

Postby Viktor » Tue Dec 20, 2016 9:16 am

Hello, I'm a SF novelist and I need some info :) I'm not native speaker, so sorry for my not optimal English :)

What conditions must be fullfilled to make the moon fall/move closer to Earth? I thought about some options:

1) a momentary slower/stopped spinning of the Moon due to a large amount of nuclear detonations on Moon's surface
2) a momentary increase of Earth's gravitational pull (what can cause it?)
3) a gravitational wave caused by a major solar activity or a nearby passing of a big comet
4) testing of a magnetic weapon from Earth gone wrong

Which of those options are more reliable from a scientific point of view? Any other idea?

Thank you a lot :)
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Re: Necessary conditions to make the moon fall an Earth

Postby JohnDuffield » Tue Dec 20, 2016 3:01 pm

Victor : I think the best scenario would be testing a spacedrive or anti-gravity device.
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Re: Necessary conditions to make the moon fall an Earth

Postby Viktor » Wed Dec 21, 2016 9:38 am

Thank you, JohnDuffield! Now I take a note to remember to send you a copy of my novel (if it will be published) :D
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Re: Necessary conditions to make the moon fall an Earth

Postby gimpyastronut » Fri Aug 11, 2017 10:48 pm

Viktor wrote:Hello, I'm a SF novelist and I need some info :) I'm not native speaker, so sorry for my not optimal English :)

What conditions must be fullfilled to make the moon fall/move closer to Earth? I thought about some options:

1) a momentary slower/stopped spinning of the Moon due to a large amount of nuclear detonations on Moon's surface


IMHO I think this is a bit clumsy. Better would be a very massive asteroid hitting the Moon from the back side. We have an example of such a scenario with the Aiken Impact Basin.

Viktor wrote:2) a momentary increase of Earth's gravitational pull (what can cause it?)


Not likely. The only way for Earth to get more gravitational pull is for its mass to increse. This would require an asteroid shower that makes the Moon´s impact trivial.

Viktor wrote:3) a gravitational wave caused by a major solar activity or a nearby passing of a big comet


Gravitational waves tend to be very weak, which is the reason LIGO is so large.

Viktor wrote:4) testing of a magnetic weapon from Earth gone wrong


I don´t think anyone could generate a magnetic field that strong: so this scenario would be very unlikely.

Viktor wrote:Which of those options are more reliable from a scientific point of view? Any other idea?

Thank you a lot :)


The best scenario is a massive asteroid coming from the Sun (so that it is not observed until too late), then smacking the back side of the Moon during a new moon (Moon is dark and back side points toward the Sun). Then the politicians argue over what is more threating to Earth: the Moon impacting in about two weeks or climate change in 100 years. :)
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