It’s a girl (or a supercomputer!) for Elon Musk and Grimes. The existence of the on-again couple’s latest offspring was made public after an interview with the singer and Vanity Fair when a baby could be clearly heard crying upstairs at the singer’s home. Whoops! But you probably don’t really care about that — you just want to know the little one’s name, right? After all, the eccentric pair named their first child X Æ A-12, so there’s absolutely no way they named their second child Kate or Sara. never. So here’s baby Musk’s name: Exa Dark Sideræl, or Y, for short.And here’s the much-needed explanation: Exa refers to the supercomputing terms exaFLOPS (the ability to perform 1 quintillion floating-point operations per second, obvi), while Dark represents “the unknown.” She told VF, “People fear it but truly it’s the absence of photons. Dark matter is the beautiful mystery of our universe.” As for her second middle name of her, it’s pronounced “sigh-deer-ee-el” and is “a more elven” spelling of sidereal, which she explained to be “the true time of the universe, star time, deep space time, not our relative earth time.” It is also a homage to Grimes’ favorite Lord of the Rings character, Galadriel. The singer also mentioned in the interview that Exa was not her first choice for a girl. That was actually Odysseus Musk, because, “a girl named Odysseus is my dream.” .