lol

ooooowwww!!!!  This pic is just SMOKIN'!!   

Definitely agree!   

Decided to post here anyway. After all, I found Clifta at Youtube for anyone else wondering what happened to her.

Here's a link to a recent video, http://www.youtube.com/watch?v=MMHhuz8iV6s#t=0m56s. I like the smile she does at the comment where the video starts. "Can you tell, I'm still a bodybuilder at heart?"  Yeah baby! Not in contest shape but still got it.

Here's a link to her channel = http://www.youtube.com/user/CliftaFIT.

I'm afraid Solarian's approximations are fairly accurate on the reality of the circumstances that would occur in your proposed scenario. The collision would be cataclysmic and anything within a certain distance would probably be destroyed. Whew! sorry. Slipped into my Doctor Who/Carl Sagan mode there.
 
Anyway, if you want realism, you will need to change something of your idea. Maybe the characters are not of that region of space? Maybe they had an unmanned probe monitoring the planetary system from light years distance. What are the characters setting? Do they have advanced technology? Some kind of hyperdrive space travel? Or they have a generation ship or something like a stasis field as they travel a million, billion years to the planetary system? Just some suggestions. 

Yes. I saw this "thing" first at http://fbbtv.blogspot.com/2009/10/androgynous-caroline-wang.html, and got sick to my stomach. I don't care what anyone here has to say of me. My moniker is "luvmuslgirls"! That is, women. If this was the direction women's bodybuilding took off to in the beginning, I would never have come here or any website presenting it.

If only there really were women like that at the gym. At least, not my gym. Well maybe, I did see one nicely muscular woman there once. But that was it. 

Nice body? She's a stick, just about. Doesn't fit my impression of this forum.