Imagine you have a disc, then the cente if mass is at the centre as there is an equal amount of mass at every point from the center in all directions. Its the same for a donut shape and sphere and the amosphere.
You have to assume that the atmosphere as a uniform density and thickness in all directions.
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At the centre of the Earth!
Imagine you have a disc, then the cente if mass is at the centre as there is an equal amount of mass at every point from the center in all directions. Its the same for a donut shape and sphere and the amosphere.
You have to assume that the atmosphere as a uniform density and thickness in all directions.