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An unnova is an event at the end of a star's life when it collapses on itself without the emission of large numbers of particles and energy. This is unlike the mechanisms of high energy release during a nova or supernova.
originally posted by: Sillyolme
a reply to: riley
I'm thinking that a star blinking out that's visible from earth would have been noticed by someone's other than you. Not saying you didn't see something of course. It probably wasn't the death of a star.
And if you can see the star you'd see the supernova and it would be evidenced for days or possibly weeks afterward.
We may get to witness the death of a star ourselves.
Betelgeuse a bright star in Orion is dying and will be quite a show when it does.
It's just a question of when. Apparently any time between now and a million years from now. Patient???
originally posted by: riley
Ours weren't exactly accidents though.