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About now it would be a good time to get out and take a look at signals, constellations, signals. In fact, signals is a constellation. There's a black hole, very close to a signal, very close to one of the stars that are within that constellation. In fact, that black hole was the evidence for what was discovered here in Ontario. We have the David Dunlop Observatory by Tom Bolvin, so the very first indirect evidence for a black hole was discovered here. However, this here, I'm going to mention here tonight, that would be Cygnus X1, if you want to look it up. This one here tonight is a blinking nebula. It's officially its NGC 6827. You've got a scope, medium scope, something that can give you at least magnitude 8.8, so you don't do that.