[RayChuang88]

I think one star astronomers have to worry about is Betelgeuse, about 649 light years from Earth. That star could be on the verge of a massive supernova explosion and when we finally see it, it could be hitting us with a massive dose of cosmic radiation that could have devastating effects of life on Earth (especially if the initial radiation we see is gamma rays).

[adaven]

Yup. That’s going to be one big firecracker!

[LS]

Which, by the time it reaches us, would make me, lessee, about 800 years old?

[Boogieman]

“especially if the initial radiation we see is gamma rays”

So we all turn into the Hulk. No biggie :)

[NorthMountain]

(especially if the initial radiation we see is gamma rays).

Speed of light in vacuum is not a function of wavelength.

[Bloody Sam Roberts]

on the verge of a massive supernova explosion and when we finally see it,

"We" won't see anything unless it has already happened and that...about 600 years ago.

And, I thought Betelgeuse was in its death throes much the same as our Sun will be at the end. A white/yellow average sun that has expanded to a red giant. I'm not certain what the history of BG is.