Hi, Can someone please help me understand these two situations? 1. When an airplane is flying from point A to point B, is Earth stationary from the point of view of the plane? While I am not sure, I think the answer to this question is yes, because a plane flies within the atmosphere of Earth and these atmospheric layers must be rotating at the same speed as Earth. Is that correct? 2. Is it possible to take advantage of Earth's rotation (about 1000 miles per hour) to travel from point A to point B? Why can't we create a rocketship that launches from point A on Earth, goes into the outer space in a straight line, stays there until point B is underneath it (due to earth's rotation) and then comes down? Thanks.