Betelgeuse should we get under the bed?

[leemanley]

And being so close, we should get a brilliant view of a SNR as it forms.

I wonder what form such a SNR would take, and how long it would take to develope.......................?

[Digger1895]

So if it'll have little or no effect on us or our planet will it have any effect on things we can see or use, if that makes sense &0(

[symesie04]

I wonder what form such a SNR would take, and how long it would take to develope.......................?

I believe planetary nebula from super nova events expand at around 1/20th the speed of light so i leave it down to your own mathematics to work out its extent at any given point in your life should of course Betty gone that way some 640 years ago.