How can you throw a ball as hard as you can and have it come back to you, even if it doesn’t bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you. What occurs once in every minute, twice in every moment, yet never in a thousand years?
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How can you throw a ball as hard as you can and have it come back to you, even if it doesn’t bounce off anything? There is nothing attached to it, and no one else catches or throws it back to you. What occurs once in every minute, twice in every moment, yet never in a thousand years?
If you are standing on a spherical planet, throw it in a direction parallel to a tangent to the planet's surface with a high enough velocity and it will go into orbit. (a spherical orbit) And then, you can collect it when it completes a rotation.
(I'm sure there is some way to calculate the speed with which you should throw it parallel to a tangent to the surface so that it goes into a spherical orbit)
This is the same way planets revolve around a star. If the initial velocity with which you throw the ball is not tangential to the surface, but in some other direction, the path followed will be an ellipse (as observed with many planets).