Urania observed the way Rosario's smile slipped and she said, "the party is a means to an end, really. Gathering people who might not come to a dry scientific talk without the lubrication of wine." Part of Urania wished it was Dionysus' wine that was flowing in her cup, but she knew it would have taken out half the people in the room. "Any time someone seems as though they're about to start awkward small talk, I've been asking them what celestial body they would be and why."
Urania knew that the way in which she had brought the question up left it open to Rosario whether she answered or not, and that was her choice. Urania was sure she would find the answer somewhat illuminating, but she had plenty of time to learn about Rosario.