Q&A: Normal Stars, White Dwarf Stars, and Star Clusters
Is Antares showing signs of pre-Supernova
activity like Eta Carinae or Betelgeuse?
We believe it will be many years before Antares shows any
signs of pre-supernova activity. More information on this star may be
which explains the process by which the star evolves and explodes.
Another site you may appreciate is at the University of Michigan, again
on the evolution of stars:
If you consider that even the most massive stars, with the shortest
lifetimes before exploding, still live for about 2 million years, then
you can see that it would be an amazingly lucky coincidence if we
happened to look with a telescope at a star at the exact moment it
began to show signs of pre-explosion activity. Although, as you'll
read in the Chandra site mentioned above, if we had had a telescope in
the year 1054, we would have observed an event just like this. We may
get lucky again in our lifetime!