[assemble]

Ummmmm... There is almost no air in space, which causes there to be no sound in space. Therefore, the ability to go 'supersonic' in space is highly overrated, seeing as sound simply doesn't even try. This all leads me to believe there's probably not bowshock either.

[novas0x2a]

You're right that there isn't much air in space, but bowshock isn't specific to "air". There most definitely is bowshock in space: http://en.wikipedia.org/wiki/Bow_shock

[assemble]

The person mentioned supersonic, so I figured that's what the bow wave was referring to. Doesn't help that I work in aircraft and haven't been keeping up on my space knowledge lately ;) (And I don't work on cool military supersonic things, so my supersonic is rusty too...)

I still maintain you can't do do supersonic things in space. The would imply sound moves in space.