This visualization shows how bright it may become: http://mesic.hvezdarna.cz/2009/06/az-exploduje-betelgeuse.html http://mesic.hvezdarna.cz/2009/06/az-exploduj

This visualization shows how bright it may become: http://mesic.hvezdarna.cz/2009/06/az-exploduje-betelgeuse.html http://mesic.hvezdarna.cz/2009/06/az-exploduje-betelgeuse.ht... On the one hand it looks pretty cool, on the other such bright star would make the other stars invisible.