Is there less gravity at the centre of a planet?

Question

If I could go into the centre of the Earth, dead centre I suppose, theoretically if it was survivable and such, would gravity at the core be as much as here? Would it be concentrated in a bubble?

Or does it dissipate as it goes through the layers of the planet, and become less potent at the centre?

Answer 1

It dissipates as it goes through the layers of the planet, and becomes zero at the center. But provided you can get the center of earth, the atmospheric pressure would be in the order of 100 atmospheres (15000 psi)

Answer 2

It becomes less as you go down into the planet. At the center, the net gravity is zero. This is because the matter "above" you is a shell around the Earth, and its gravity cancels out. Only the matter below you pulls you down.

Of course, there is still _pressure_ from all the matter being squeezed down.

Answer 3

Gravity would be zero at the center because all the mass above you would be pulling you up and the way the math works out, you would be pulled up in all directions and it would cancel out.