My applied maths teacher proposed this question while we were having a discussion about gravitational effects. We do not know the answer. Given a hollow cylinder with a mass large enough to have its own gravitational effects, placed in zero gravity. If you propel an object into to an open end of the cylinder, what path will it take? (a) continue straight downward? (b) move to the centre and continue straight downward? (c) move to the nearest side? (d) spiral downward? the attachment with this thread is my bad diagram of the cylinder. We are extremely curious as to what the answer is so we would be extremely grateful if it could be figured out by better minds.