hmm..

OK...from what I remember about pressure....

There is atmospheric pressure....which is only what is above us. this is part of the reason why pressure as you get higher up (on everest) pressure is less then when you are in death valley...where it is more.

So, the way I look at it...if I were able to dig a way to the center of the earth...a solid hole...I would be at higher pressure. Not because of the gravity (as determined before)...but because I have that much more atmosphere above me....

But...wait...my head is hurting....

the atmosphere is there probably from the gravity of the earth...right?

So...as you get closer to the center of the earth....would the pressure diminish the same as my own weight?

ARRRGGGHHH!

Logically...the air particles that make up the atmosphere would be affected the same as someone going to the center.

If that is the case...then yes...a vacuum...and weightlessness....at the center of the earth.

Right....time to lie down