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/sci/ - Science & Math

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7518073 No.7518073 [Reply] [Original]

Why does our Planet have such a big moon relative to it's size?

>> No.7518075
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7518075

>>7518073
Also more space pics.

>> No.7518076

>>7518073
https://en.wikipedia.org/wiki/Giant_impact_hypothesis

>> No.7518080
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7518080

>>7518075

>> No.7518089

In short, the Moon (Luna) is the result of a planet the size of Mars striking early Earth at a glancing blow. The two worlds combined, Earth got a giant iron core and the left over debris coalesced through process of accretion into a fairly large moon.

>> No.7518113

>>7518073
Its a spaceship

>> No.7518128

Depends what you mean by "why". If you're talking about how it happened, then probably the giant impact hypothesis mentioned above.

If you mean why are we on a planet with a large moon when that seems to be unusual, there may be anthropic reasons in that it helps life to develop by acting upon us with tidal forces etc

>> No.7518131
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7518131

>>7518113

>> No.7518553

>>7518089
iron core is speculated to explain the earths magnetic field. but its way past curie temperature point.

>> No.7518573

>>7518073
Aliens used our solar system to host a game that involves turning entire planets into navigable space vessels and smacking them into each other like a giant destruction derby.

The moon is actually a huge chunk of the Earth that got blown off yet kept orbiting the planet.

This is also the reason why we have an asteroid belt.

>> No.7518576
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7518576

>>7518573

>> No.7518609

>>7518089
Note that both Mercury and Venus received such impacts as well, but from more severe angles. Hence Venus being flipped over and Mercury's mantle having been blown away.

>> No.7518634
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7518634

>>7518609
Yeah I often think of Venus being exactly what Earth could have been if events hadn't been so fortuitous. Eerily, Venus is kind of foreshadowing the nightmare climate change scenario humans may face one day, a total runaway greenhouse effect.

>> No.7518636

>>7518634
If we somehow managed to crash Enceladus and Europa into Venus at an angle, do you think we could make it's core start rotating and reverse the greenhouse effect with all the ices and water?

>> No.7518640
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7518640

>>7518634
Venus is actually planet of the Spookies.

>> No.7518644

>>7518636
Thats a pretty crazy idea, but it sounds possible if you had the ability to move worlds. But since you'd essentially be restarting Venus, it's going to be millions of years before the planet reforms and the crust cools to the point where it acts like a dynamo.

>> No.7518651

>>7518636
In the thousands (or even million) of years it takes Venus to cool off from such impacts, sure.

>> No.7518658

>>7518651
What this Anon said. Even then, you could throw it out of orbit and send it even closer to the sun, which sort of just ruins the idea. Plus, it's not even in the habitable zone for our system.

>> No.7518662

>>7518658
>it's not even in the habitable zone for our system

Fun fact, if you moved Earth to Venus orbit global temp would only rise by about 30F, which of course is catastrophic, But nothing compared to the 900F of Venus' surface.