Is there any truth in the idea that the moon was once part of Earth, but was separated from it at some stage?

Answer 1

It's a hypothetically possible theory. In point of fact the moon probably was a part of the earth at some point - in the loosest sense of the terms, but it's more a question of whether it was made from the same stellar debris the earth was made from (in the same way the earth itself had been created from stellar debris), or whether it was broken off sometime after the earth became a planet is a subject of debate among astrologists and an unproven theory.

Answer 2

Yes there is truth in this. Two facts that support this idea.
The Earth and the moon are of similar composition and the fact that the moon moves away from the earth at about 1 inch every year means that most likely the moon was part of the Earth at one point in time.

Answer 3

Evolutionists (and progressive creationists) deny the moon’s direct creation by God. They have come up with several theories, but they all have serious holes, as many evolutionists themselves admit. For example, lunar researcher S. Ross Taylor said: ‘The best models of lunar origin are the testable ones, but the testable models for lunar origin are wrong.’9 Another astronomer said, half-jokingly, that there were no good (naturalistic) explanations, so the best explanation is that the moon is an illusion!10

1. Fission theory, invented by the astronomer George Darwin (son of Charles). He proposed that the earth spun so fast that a chunk broke off. But this theory is universally discarded today. The earth could never have spun fast enough to throw a moon into orbit, and the escaping moon would have been shattered while within the Roche Limit.
2. Capture theory — the moon was wandering through the solar system, and was captured by Earth’s gravity. But the chance of two bodies passing close enough is minute; the moon would be more likely to have been ‘slingshotted’ like artificial satellites than captured. Finally, even a successful capture would have resulted in an elongated comet-like orbit.
3. Condensation theory — the moon grew out of a dust cloud attracted by Earth’s gravity. However, no such cloud could be dense enough, and it doesn’t account for the moon’s low iron content.
4. Impact theory — the currently fashionable idea that material was blasted off from Earth by the impact of another object. Calculations show that to get enough material to form the moon, the impacting object would need to have been twice as massive as Mars. Then there is the unsolved problem of losing the excess angular momentum.11

Conclusion

The moon is a good example of the heavens declaring God’s glory (Psalm 19:1). It does what it’s designed to do, and is vital for life on Earth. It is also a headache for evolutionists/uniformitarians.

http://www.creationontheweb.com/content/view/764/

Answer 4

That is the prevailing scientific theory, yes. It wasn't so much "separated" as something huge crashed into the earth, sending a zillion tons of debris out into space. Earth re-formed as a smaller planet and over time, the debris coalesced to form the Moon.

I watched a program about this several weeks ago (science channel? national geographic channel? can't remember) and it was pretty fascinating. One leading researcher has come up with a model showing a pretty complex collision had to occur, one in which the initial collision caused a *second* re-collision which put all the debris pieces in the places they needed to be.

Answer 5

The theory goes that a rogue planet smashed into the developing Earth and the matter that was thrown out into space coalesced and became what we know of as the Moon.

Answer 6

Well, as stated above, the moon is probably the result of a large-body strike early in it's history. Material that made up the early Earth and the foreign object became part of the moon.

Answer 7

At this time its a theory put forward, but the rock samples from the moon would suggest not

Answer 8

No, it was formed when a giant asteroid the size of mars hit into the earth, the debris formed the moon

Answer 9

Yes, from the samples brought back by astronauts from the moon.

Answer 10

Nobody knows for sure but as of now most astronomers and the like are in agreement that this is what most likely happend. impacted by an object of some sort.