Sam Wormley posted Sat, 27 Apr 2013 16:02:26 -0500



On 4/27/13 11:56 AM, Poutnik wrote:

Yousuf Khan posted Sat, 27 Apr 2013 13:34:29 -0400



On 26/04/2013 9:46 PM, wrote:
If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth

Only if the GRB it produces is pointed towards us. That means that its
polar jets need to be pointed towards us within 2 degrees. The most
recent study done shows that its polar jets are pointed away from us by
about 20 degrees, so we're safe.

What about expected radiation spectrum ?

Even sourcee weaker then Sun
can have unpleasant high energy spectrum part.



Ozone and oxygen in the earth's atmosphere blocks most gamma,
x-ray and hard UV.

I do know that, the question is, if that is enough.

The Sun eruptions and solar winds have influence as well.

--
Poutnik