Hi all, I had an exhaustive time looking on the web for software (either free or commercial) that allows someone to simulate trips into the solar system from planets. I'm looking for something that can simulate spaceship flybys in Hohman Transfer Orbits, Gravity Assists, Oberth Effects, boosting your ship's rockets, etc. The software would also allow the real time configuration of the planets. For example, in the year 2030, could I see what paths a ship might take to get from Jupiter to Venus. If anyone knows of such a simlulator, I would really appreciate it. It doesn't need great pictures of the planets and moons, but the focus would be on trajecteries of space craft.