how did a planet as small as the earth capture such a large moon?

[AV1611VET]

Ehhhhh.....

The technically correct answer is that the earth and moon orbit a common center of mass. Because the center of mass is located within the earth (though not at the center of the earth), it's approximately correct to state that the moon orbits the earth. That's one reason why the earth continues to rotate with a much faster period rather than settling into a synchronous orbit around the sun, as Venus and Mercury have.

So technically the earth orbits itself?

 

[SkyWriting]

how did a planet as small as the earth capture such a large moon?

It's a near impossibility. Likely such a occurrence will never be found anywhere else. We went to the moon just to answer that question and came back without an answer. And we were worried about moon diseases and checking for life at the same time. Little did we know, life is nowhere else.

 

[SkyWriting]

So technically the earth orbits itself?

The two "sister" planets orbit each other.
But the entire cosmos orbits the mass of your body as well.
Just to a smaller but still measurable degree.
Whatever mass you are, the cosmos must adjust to it.

 

[florida2]

So technically the earth orbits itself?

Not quite

This video has a pretty neat video demonstrating the orbit of the moon and the Earth.

https://www.youtube.com/watch?v=uGBANgbRkws

Barycentric coordinates (astronomy) - Wikipedia, the free encyclopedia

Any two bodies orbiting each other orbit a barycentre - even something as big as the Sun is affected by the planets.

 

[florida2]

It's a near impossibility.

Exactly - the moon being captured is very unlikely. That's why the current theory is the collision theory. Rocks which have been analysed from the moon are almost identical to Earth, supporting this theory.

Little did we know, life is nowhere else.

Not finding life on the Moon does not mean that there is life nowhere else.

It is incredibly unlikely that there is no life elsewhere, possibly even very simple life elsewhere in the solar system.

 

[AV1611VET]

Not quite

This video has a pretty neat video demonstrating the orbit of the moon and the Earth.

Thank you, sir! That was enlightening.

 

[andy b]

if the moon was part of the earth why do we have an atmosphere and water and the moon doesn't...also where did all the water on the earth come from if we where a ball of fire due to the collision/

 

[RiemannZ]

if the moon was part of the earth why do we have an atmosphere and water and the moon doesn't...also where did all the water on the earth come from if we where a ball of fire due to the collision/

you need sufficient gravity and preferably a magnetosphere to sustain an atmosphere, the moon is just too small for either

fire doesn't destroy water, it just becomes a gas

 

[RealityCheck]

if the moon was part of the earth why do we have an atmosphere and water and the moon doesn't...also where did all the water on the earth come from if we where a ball of fire due to the collision/

Gravity. We have more of it. We can hold an atmosphere, moon can't. Moon also lacks the temp/pressure to maintain liquid water at the surface.

Water is not difficult to produce. It is a common by-product of many chemical reactions.

And the earth was not a "ball of fire"... you really need to use more precise terms. "Molten" or partly molten may be better. And in any case, the earth had been molten before such a collision as well.

 

[SkyWriting]

Exactly - the moon being captured is very unlikely. That's why the current theory is the collision theory. Rocks which have been analysed from the moon are almost identical to Earth, supporting this theory.




Not finding life on the Moon does not mean that there is life nowhere else.

It is incredibly unlikely that there is no life elsewhere, possibly even very simple life elsewhere in the solar system.

Perhaps. But all evidence says no.
And I like to use evidence over dreams, hopes, and visions on occasion.

 

[Lollerskates]

.

 

[SkyWriting]

This video also holds true fro the earth and the rest of the cosmos. All of Creation rotates around the mass of the earth to some extent.

Additionally all of space seems to be expanding in all directions at once. This means that every point can be considered at the center of expansion.

So Geocentrism has scientific truth to it. And is supported by our language as well.

https://www.youtube.com/watch?v=uGBANgbRkws

Barycentric coordinates (astronomy) - Wikipedia, the free encyclopedia

Any two bodies orbiting each other orbit a barycentre - even something as big as the Sun is affected by the planets.

 

[RealityCheck]

Perhaps. But all evidence says no.
And I like to use evidence over dreams, hopes, and visions on occasion.

Hmm. So you admittedly use evidence over wishful thinking "on occasion." And that clearly means there are times you say "screw the evidence, I'm gonna believe what I wanna believe because I wish it was true."

Do I have that right?

 

[RealityCheck]

This video also holds true fro the earth and the rest of the cosmos. All of Creation rotates around the mass of the earth to some extent.

Additionally all of space seems to be expanding in all directions at once. This means that every point can be considered at the center of expansion.

So Geocentrism has scientific truth to it. And is supported by our language as well.

No. The rest of the cosmos doesn't "rotate around the mass of the earth" to any extent. It might be technically correct to say that other objects rotate around the center of mass of the object-Earth system, if you're just considering the isolated system of that object and the earth. But aside from the moon and small near-earth objects like occasionally passing meteoroids, with any other object the center of mass of the object-earth system will be well outside the earth.

And no. While space may seem to be expanding all at once in all directions, it's not correct to say that every point can be considered the center of expansion. That's as correct as saying that when you're blowing up a balloon, any point on the surface of the balloon is the center of the balloon's expansion. That's wrong. The center of the balloon's expansion is inside the volume of air being blown into the balloon, not anywhere on the surface.

Geocentrism has no scientific truth in any form.

 

[NannaNae]

Yes that is the scientific consensus - that F=Gm1m2r/r^3 made it so that the dust from the earth body coalesced into a spherical body of the side (and density) of the moon.

But, do the classical gravitational equation:

F=(Gm1m2/r^3)*r: That body of the moon is gargantuan for the size of earth. That is why our tides, moods, and functions of this planet are so acutely affected by the moon (menstruation cycles, legends of hounds and gouls at full moon, strange activity equated with a full moon, etc.) The moon is in some cultures considered "Luna," a "planetoid" because of its size and influence - not a satellite like Europa to Jupiter.

when I hear this theory I always want to ask if the moon came from the earth why doesn't it look like a turd.

why do they always get round when it obviously isn't molten....

or how did we get a layer on the earth that is six feet down 4 to 40 feet deep , spread across most of western hemisphere and we're not molten now or ever .. so how did the moon get round.. why doesn't it look like a turd if the moon came out of the earth and earth's atmosphere and how did just that layer earth match the moon.... unless just that layer pushed out the moon ... then it would have to look like a turd/ some other shape it peeled off , anything except round....

 

[trunks2k]

or how did we get a layer on the earth that is six feet down 4 to 40 feet deep , spread across most of western hemisphere and we're not molten now or ever .. so how did the moon get round..

Gravity. Gravity tends to form things into a ball. If the moon came from the earth (probably did in some form), it wasn't just a piece that cleanly broke off. Whatever caused the mass of the moon to separate from the earth would have been cataclysmic. So you're talking a ton of "small" pieces of rock being ejected from the earth, which then attract each other via gravity and start clumping together. When that happens, you are going to end up with a spherical shape. Also, IIRC, the moon was at one time molten hot but has since cooled.

 

[PsychoSarah]

Ehhhhh.....

The technically correct answer is that the earth and moon orbit a common center of mass. Because the center of mass is located within the earth (though not at the center of the earth), it's approximately correct to state that the moon orbits the earth. That's one reason why the earth continues to rotate with a much faster period rather than settling into a synchronous orbit around the sun, as Venus and Mercury have.

As if I needed to make it more complicated. This is why a lot of people leave arguments without learning anything, a great deal of people will have no idea what you are talking about.

 

[selfinflikted]

As if I needed to make it more complicated. This is why a lot of people leave arguments without learning anything, a great deal of people will have no idea what you are talking about.

So, instead of trying to get people to use their noodle, dumbing down is better? No.

 

[PsychoSarah]

So, instead of trying to get people to use their noodle, dumbing down is better? No.

That isn't what I mean, but concepts should be presented in ways that people outside of scientific fields can, with relative ease, understand them. Otherwise it makes people feel stupid, and people don't like to feel stupid and rather than asking for clarification, many people will just ignore the presented information.

 

[NannaNae]

Gravity. Gravity tends to form things into a ball. If the moon came from the earth (probably did in some form), it wasn't just a piece that cleanly broke off. Whatever caused the mass of the moon to separate from the earth would have been cataclysmic. So you're talking a ton of "small" pieces of rock being ejected from the earth, which then attract each other via gravity and start clumping together. When that happens, you are going to end up with a spherical shape. Also, IIRC, the moon was at one time molten hot but has since cooled.

AH .... space where stuff floats and has enough gravity to form sphere with non liquids? stuff is floating around . it has no gravity . there is magnetism and it doesn't form anything solid into huge circles... especially since the moon isnt circling either. it always has a side that faces us !
if you are talking about the earths gravity and pressure on earth as it left , or peeled off of earth as it left. .. it would all the more prove it should look like a turd... you know your sphincter muscles/your butt if it came out of the earth like they say it did.

it still doesn't explain how we have 4 to 40 ft of sterile moon stuff all connected and in some parts of the earth ( north america, south america and middle east and western europe) is gray sterile stuff , stuff that only matches the moon and there is 4 to 40 feet on top of that of sterile sand or sands with whole trees still not even petrified , it is still good wood.. how big a wave does it take to bury 80 ft trees in 40ft of sterile sand ? what does that wave look like exactly?
but that moon stuff is not other places and whole different configurations all over Australia and Oceania, going up into India and Tibet ....... but above all the sterile moon and or of rare earth ??? and nano diamond layers of burned earth is 4ft to 40 ft of sterile sand.. if the earth is billions of years old why is there so many feet and all that sterile moon and sand stuff under there except for a dead mammoth or two and they are only on top buried only a few inches down ?
why is there billions of tons of mammoth bones off Norway in the oceans?
why do they throw away tons of mammoth bones from dredging the sea floor off of Norway . what were those mammoths doing up there anyway sea fishing? Ice surfing ? yep that is what disney is selling to our kids in the name logic and science ! yep !
Do any of you know how many lbs of food just a regular elephant needs every day in freezing weather , well maybe someone should have told Hannibal about those ice surfing mammoths ate and he could have fed his animals what ever they were eating...

you would need a whole tribe of sea faring neanderthals willing to go to faraway places for green stuff just to keep one fed before it froze to death from all that ice surfing disney has them doing in the frozen tundra or worse solid ice , where nothing green grows.. and they don't eat fish.
and the moon if it came from the earth should look like a peeling or a turd.
Because it isn't spinning and it has no reason to be round. there is plenty in this universe that isn't round that the moon should be round .