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Aaron Thomas asked the Naked Scientists: Dear Chris,Thank you for answering my question in your Astronomy Podcast.I would like to pick your brain again though, in relation to your answers included in the show on the 25/11/10.If the fact that we are in so called free-fall orbit around the sun would indicate that this area of zero gravity is not affected by the gravity of the moon or sun then;
Why do we have tides on the surface of the planet where gravity is at full strength?
Is this not effected by the pull of the moons gravity? If the moon can exert such an influence on the surface of the Earth then would it also do something to the huge area within the Earth that is less effected by gravity?
TbaronI think the consensus of opinion is that the core of the Earth is solid Iron surrounded by a layer of molten Iron.
Gravity is full strength everywhere. It's not stronger here and weaker there.