Quote:
Originally Posted by tonybarry
The main issue with the proposition is the absolutely enormous amount of energy required to alter the spin axis of the earth. The rotational inertia is immense and the necessary energy could not be applied to the globe easily.
The only forces we know that could do the job would be asteroid impacts, at Late Heavy Bombardment levels.
https://en.wikipedia.org/wiki/Late_Heavy_Bombardment
Given that this would provide a comprehensive extinction of life on earth, I don't think it could have happened, and likely not since the Cambrian Era when life is first known to have existed here.
The current understandings of Planet Nine solar system mechanics indicate that it *may* be possible for large objects in highly inclined orbits to alter the plane of the Solar System with respect to the Sun's equator; but this is not confirmed, and in any case does not work to change the spin axis of the planets.
Regards,
Tony Barry
WSAAG |
Too True this Barry.
Earth at..
6x 10^24 KG, and Spinning so fast would indeed require incredible energy to change its orbit or equator, and be the end of any life.
bigjoe