Wouldn't a supernova in THIS galaxy be a treat? (At a safe distance, of course!)
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Wouldn't a supernova in THIS galaxy be a treat? (At a safe distance, of course!)
As always, ask to be added to the APOD PING list OR subscribe to the APOD topic!
It's some kind of shockwave. Our own sun is in the middle of a large region that has been cleared of dust and gas by at least one supernova. Supernova 1987A seems to be in the process of clearing out its own neighborhood.