iv heard the theory that the binary system of the moon and earth is a result of an ancient collision with some rogue planet or some large object, which seems to have split the moon from the earth and set us in this rotating motion

but that would mean the object itself was somehow absorbed into earth and became part of it

so, im  just wondering, would it not make more sense that the moon itself might actually be that object? or the remains of it?

Edited May 18, 20232 yr by boo

See this computer simulation of the collision: 

 

On 5/18/2023 at 4:19 AM, boo said:

iv heard the theory that the binary system of the moon and earth is a result of an ancient collision with some rogue planet or some large object, which seems to have split the moon from the earth and set us in this rotating motion

but that would mean the object itself was somehow absorbed into earth and became part of it

so, im  just wondering, would it not make more sense that the moon itself might actually be that object? or the remains of it?

Yes, the simulation above shows the prevailing theory.  Theia, a Mars-sized object, grazed the Earth and much of its' iron core joined the Earth's core.  The Moon has a small iron core and is mostly mantle, made of crustal material very similar to Earth's crust.