reply to post by AngryCymraeg
We spin on a cock-eye axis. And we wobble. Also, if you believe some, the spin of the internal solid core of the planet.
Mars has a 25 degree tilt. Jupiter has a 3 degree tilt. Saturn has a 26 degree tilt. Neptune has a 28 degree tilt. Uranus has a whopping 97 degree
tilt. Mercury has a 2 degree tilt. And Venus has a incredible 177 degree tilt.
Earth's "wobble" (better known as precession) is due to the Earth being tugged on by both the moon, the sun, and even Jupiter.
In order for your volcanoes to create the Earth's spin (which, btw, how did the gas giants and the sun get their spin then?), they would have to
erupt in a more lateral sense, instead of the more vertical that we normally see in most volcanoes. And they would have had to do that most of the
time.........and they would of had to erupt with the force of over 7 quadrillion megatons of TNT worth of energy, each time (to over come the inertia
of the mass of the Earth in order to impart angular momentum), AND....they would have needed to always erupt in the same, or very close to the
Someone could do computer simulations, sure. However, in order to do the simulation, they would have to put the numbers in from the math......and
before you even get that far, the math shows: this isn't going to work.
Smaller eruptions over time, ejecting smaller amounts of material, so that they then gather and form the moon (sorry, would take way too long. The
moon would not be as big as it is then, because of the amount it moves away from Earth each year, not enough material would have created it....it
would get too far away from newly ejected material in a lower Earth orbit. The only way for that newer material to get to a higher orbit, is for it to
have more energy added to it.....that's how you get from a lower orbit to a higher orbit: more thrust), those smaller eruptions would not have nearly
enough energy to over come the inertial of the Earth's rest mass. No where near enough.
The giant impact hypothesis on the other hand........it actually works...and is why (for now) it's the most widely accepted theory.
Here is why:
Computer simulations based upon the most current theories of planet formation about a star, show that the early solar system had a lot more rocky
bodies around the sun in the inner solar system. Most models produce about 20 "rocky planet" sized objects.
Many of those end up being flung out of the solar system, or end up spiraling into the sun.
Others end up impacting each other, resulting in destruction. Or, in the case of the Earth: a new moon.
The simulations show that it is very possible for both our Earth and a Mars sized body to have formed in about the same orbital distance from the sun.
Over time, their paths cross, at a oblique angle.
That impact was enough to shatter the Mars body (and darn near the Earth). It also is more than enough energy to:
Increase the Earth's spin.....and move it's axis.
Because the Mars sized body formed in the same orbital path as the Earth: it has the same materials of the Earth.
Now we have both the left overs from this planet and Earth material, that have more than enough energy to be in orbit (because the other body already
had enough energy to be in orbit, and an impact of that size, would certainly be enough to have material from Earth get into orbit). Enough of the
material is outside the roche limit, and is able to start conglomerating into the moon.
The orbit of this new moon is such that it will be very slowly moving away from the Earth. The good news is: it was close enough for gravitational
braking of the Earth's spin (as the impact would have increased the Earth's spin to about a 10 hour day).
They are all theories of course. I'm certainly not touting it as "fact", when even scientist will shake their heads and say, "No, not fact, only
However, the problem with some theories is that the math does not fit. As we learned more about our Earth, the moon, and our solar system, some
theories fall out, as new information that we gain make them not fit anymore.
It could be that down the road, we meet an alien species that found records of an even more ancient alien species, that recorded how it all
happened.......and it might be that they put the moon there (not that I believe in the whole "hollow moon" theory, etc).
So for right now, all we have is theories. Some have supporting evidence, while other's have none. Some answer most questions, while others have too
many holes in them.
Without a time machine and pictures though, for now that is all we'll have: theories.