If you were standing on the moon right now (and just for the sake of argument, let’s say that you’re wearing a spacesuit,) and you looked up at the thing that it goes around, you could see a big, bright full earth up in your lunar sky. It’d be a terrific view, a sight you’d always remember. On the other hand the view of the moon from the earth today isn’t so much. In fact, you can’t see it at all, as the moon’s phase as seen from here is new. That’s when it’s in between us and the sun, with no sunlight reflecting off it that we can see. The moon is hidden, but you couldn’t say it was dark matter. The term dark matter is reserved for more exotic things in space, and this weekend, IRSC’s Hallstrom Planetarium will have a show about it. “Phantom of the Universe” will be presented on Friday night and Saturday afternoon. You can get your tickets at the IRSC Box Office, call 772-462-4750; or call toll-free at 1-800-220-9915.