A person hovering in a helicopter doesn't perceive the Earth rotating underneath him at 1,000 m.p.h or so. Is this because the Earth's atmosphere rotates with the terra firma? So hypothetically, if you were in a helicopter and, with no lateral movement, could hover perfectly above the ground exactly over the north or south pole, the helicopter would pivot around, and an object visible on the earth in front of you would remain in front of you?<br /><br /> Does gravity somehow keep a hovering object within the atmosphere geosynchronous, so to speak? Gravity pulls all matter towards the earth's core. To keep the object over a fixed point on the earth's surface, it seems it would require some kind of "sideways" pull, not exactly in the direction of the core. I mean if you were hovering over the city of Quito, Ecuador, and Quito is moving east underneath, how is the helicopter being "pulled" east? I'm just a layman so forgive any stupidity contained in the above, lol, but I can't figure it out.