Trying to recall the name of an old Megadrive/Genesis game..

Basically it was a space-trading kind of game. You would land on different planets and take what you needed, and then traded it with aliens. Sometimes the aliens would get all aggressive and try and attack you if negotiations went badly.

Oh yeah, sometimes you would land on a planet with too heavy a gravitational pull and you would end up slamming into the the planet's surface.

Anyone?!

Elite or maybe Frontier: Elite 2. At a push I'd say it was the Star Trek: TNG game