I don't know what the black hole is moving through. That is, I don't know how much "metallic" stuff there is in the cloud. The article says the stars are blue, so presumably large and hot. The article also says the triggering event probably happened about 50 million years ago - so after the death of the dinosaurs on Earth.
The article doesn't say how far away this thing is. If it's very distant, and the Universe we're looking at is young, presumably the gas is mainly hydrogen and helium. Maybe, given another billion years or so, the newly-formed stars will coalesce into a new galaxy?
The article doesn't say how far away this thing is. If it's very distant, and the Universe we're looking at is young, presumably the gas is mainly hydrogen and helium. Maybe, given another billion years or so, the newly-formed stars will coalesce into a new galaxy?