I have never seen this film, but remember it being at my Blockbuster Video growing up, so it wasn't full porn.
I believe it had girls in "sci-fi bikinis" on the cover. One the back, there was a picture of a regular guy sitting down in a spaceship with some sort of contraption in front of his crotch with what looked like a dryer vent hose attached to it. Like he was getting head from this machine. But I think his clothes were on (not "space clothes, like regular pants and a shirt).
That's about all I remember about it, since I never watched it.
It is definitely NOT any of the commonly brought up titles like Earth Girls are Easy, Galaxina, Barbarella, etc.
Does this ring a bell for anyone?