Jacqueline Pearce as Servalan (Blake’s Seven). No contest.
I know exactly what you mean.
I vote for the android chick from the ST TOS episode ‘What are Little Girls Made of?’ and of course the twin androids from ‘I Mudd’.
And ot complete the android theme Pris from Blade Runner.
Leela.
Either one.
Do these count since they are both earth bound in their appearances and not technically “space” babes?
My own vote is for Jeri Ryan.
Right On. The incomparable Sherry Jackson. But is she a “Space Babe”?
I do have some quibbles with their selections and their ratings, but one could argue that an earth-bound alien had to travel through space to get here. I would prefer to think of a “Space Babe” as someone who spends most of their time in space, has a career working in space, or at least entered space! Estella Warren from POTA never entered space, right? Also, how can they rate the magnificent Jeri Ryan lower than the nine listed in my last post?
I think that site only gives 10s if the actress in question has done nude scenes that they can grab images from and put on their pay web pages.
There’s only one possibility for hottest: Her Highness Senator Leia Skywalker Organa. sigh
I used to think that Judzea Dax was pretty hot, but then I saw the actress on a celebrity “Wheel of Fortune”. She’s good at following an intelligent-sounding script, but don’t let that fool you. Total turn-off. Kira, by contrast, is actually quite the babe, in the two-and-a-half episodes or so where she’s not trying to be a total bitch.
#1 Jeri Ryan
#2 Yvonne Craig (green Orion girl in TOS episode “Whom Gods Destroy”)
#3 Marina Sirtis
Honorable Mention: Mathilda May as the Space Girl in Tobe Hooper’s Lifeforce.
Sherry Jackson is a Space Babe, by virtue of an appearance on Lost In Space. Yay! http://community-1.webtv.net/quinzo/SherryJackson/page19.html
The hottest woman EVER in outer space? …Uhura!!!
A
I prefer Ezri Dax over Jadzea Dax, I’m a sucker for cute little nymphs.
My votes…
The cute little communications officer extra on Battlestar Galactica with the double pigtails. I don’t think they ever said her name…
Princess Karina in Ice Pirates. Royalty in a satin dress is a sure-fire hottie.
Wilma Deering from Buck Rogers. Satin jumpsuits are even better than satin dresses 
Definitely the redhead from Lexx in a tie with the brunette from Andromeda.
Natalie Portman was a few years too young in the Phantom Menace…
Sigourney Weaver was great in the first 3 Alien movies, and Sean Young (although she didn’t do any space travel) was verrry hot in Blade Runner.
Oh lovely Zev, or Xev.
The 3rd version is Zenia Seeberg. I prefer her from the series above Fire and Water.
The 2nd version is Eva Habermann. A cute little blondie.
If your a girl I might turn you on to Kai, the hottest dead guy ever from what I can tell. Certainly the guy to be, if he weren’t dead and unable to experience certain pleasures, heck any pleasures but man he can kick ass and the girls al fall for him.
I also have a thing for that little Russian from 2010, the one that got scared.
But above them all will be Barbarella and Leia. grrrrrowowow nik nik
Katherine Schell as Maya from Space:1999.
a.k.a. Batgirl.
If I have to go into space to get to them, then they are space babes. IMHO Now with sliders they are on Earths. So maybe she is traveling through some sort of spacial dimension so maybe not her. I never saw Faculty.
Oh and 7 of 9 is mostly a costume. I would look like a hot babe in that suit.
A perfectly legitimate defination. Now I get Shahna (Angelique Pettyjohn)! Sadly, I just read that she died in 1992 at the age of 48.
1 babe?
Athena from Battlestar Galactica - Maren Jensen
Oh really?, check out the Miss America Contest pics and tell me that is mostly costume.
The purple girl in Andromeda.
Counting non-space sci-fi:
Lori Petty in Tank Girl (MMM…Lori Petty…drool)
Carrie-Ann Moss in The Matrix.