1. A ship can move either to the left or the right from it's home planet 2a. You can move your ship back to your planet if it has no cargo left. 2b. If you have cargo onboard you can discard it to move straight back to your own planet. 3.The arrows on the board are only there to track your victory points and are not a direction which your ships must travel.
1. Yes, from any location even. 2a. Yes, but you still have to run out one timer for it. 2b. Yes, and see 2a. I believe you may also give it to the player whose planet you're visiting (assuming he has his spaceship or a depot there) 3. Yes.