Classic game from 1996, came out on the C64, Spectrum and Amstrad by Firebird and I wish that I had known about it back in the day as I would have really enjoyed playing this. Game has some interesting feature such flaying on planets and being able to plot a targets on your solar system map. you can find the game and the instruction on world of Spectrum (which should be the same keys for all version of the game) and their should be a link to the game from Lemon64 for the C64 version. the Amstrad version can be found lurking around as well.
Cant say I ever played that. The closest I think I could get was StarLord on the Amiga. That was a bit like that.
I like this game and have been playing the Amstrad version but I don't think I have the patience to play it all the way to the end now, bought Starlord years ago on eBay but have never got around to playing it.