Distance from North to South poles

1. Jun 30, 2007

SiTuCrois

Is the distance from North to South poles of the Earth equal that from West to East poles ?

2. Jun 30, 2007

Danger

Welcome to PF, SiTuCrois.
There are no 'east' or 'west' poles. If there were, however, the distance between them would be greater than the distance between 'north' and 'south'. The Earth is oblate, rather than spherical, due to its rotation. It's a lot bigger around side-to-side than it is up-and-down.

3. Jun 30, 2007

SiTuCrois

Thank you, I'm really sorry about the poles

But why does rotation make its side-to-side bigger ?

4. Jul 1, 2007

chaoseverlasting

This is just a guess, but I think when the planets were molten fluid masses, they were spinning at great angular velocities, and because of that (centrifugal force), the fluid tried to escape, and this attempt would have been most successful where the force was maximum (at the equator as the force equation is $$mw^2r$$ and the radius is maximum there), so most of that fluid bundled there...

Perhaps someone who's better versed in these matters could give us a more accurate explanation?

Last edited: Jul 2, 2007
5. Jul 1, 2007

Mk

Sounds right to me.

6. Jul 1, 2007

Mk

Time also goes a bit slower around the equator too

7. Jul 2, 2007

SiTuCrois

Thanks everyone,

Tomorrow I'll have a geo-course, i don't know the content my professor would teach us, but trust me, I would make real questions.

Be prepared!

8. Jul 2, 2007

Danger

We're always prepared. Bring it, dude.

9. Jul 2, 2007

SiTuCrois

I know how challenging it is for me to do this. because my professor is stricter than me and I am scared to talk to him

10. Jul 2, 2007

Smurf

PF was born prepared. Seriously, it was squeezed out still clasping it's tiny clipboard.

11. Jul 2, 2007

Smurf

By the way, NEWS is a much cooler acronym (North East West South)