Hi Sally That was my point. Supernovas because they are stars so big
and dense have only 25 million years before they collapse and explode.
Their radiation can be seen 8 billion light years away by the Hubble.
Having a star that is close to our galaxies core (brightest and most
massive in the Milky Way) and only 28 thousand LY away could end all
life in our galaxy. Well Sally I believe there is lots of life in the
universe. I believe there is lots of water in the universe. I believe we
live in the best of spacetime,more stars like our sun than any other
kind. More galaxies like the Milky way. Life in the universe
came from supernova explosions,and supernova explosions that are to
close can wipe out this life. Bert