What if (on those supergiants.)

These great stars beg the question could we survive if one exploded
about 15,000 LY from us? These stars are 100 rimes bigger than the
Sun.They radiate in the blue range because they are so very hot, This
makes them easy to find,as they stand out in the sky. They are not all
that numerous,but when they explode it is one of natures biggest
explosions,and one light up the day sky for two weeks(recorded in China)
Looking at Sher 25 and its in the constellation of Carina. I predict it
has already exploded,so look up,and dig a hole down Bert