Actually, it means "through adversity to the stars" (or words to that effect). It's a motto of the Royal Air ***** and various space agencies (or variations on it, such as "Ad astra per aspera").
To an space exploration nut like me, that just makes her even hotter. Ivy Black is beautiful, sexy, hot, cute, dirty--she does it all for me! And now, to imagine doing it for her (hehe) and seeing that motto staring up at me...
Well, it would still make me want to pound her harder, so I guess your translation was right in effect if not in detail.