REPORT COPYRIGHT VIOLATION IN REPLY
|
Message Subject
|
Official NASA: The Glow Of A Classic Supernova Will Soon Emerge!
|
Poster Handle
|
Anonymous Coward |
Post Content
|
A near-Earth supernova is a supernova close enough to the Earth to have noticeable effects on its biosphere. Depending upon the type and energy of the supernova, it could be as far as 3000 light-years away. Gamma rays from a supernova would induce a chemical reaction in the upper atmosphere converting molecular nitrogen into nitrogen oxides, depleting the ozone layer enough to expose the surface to harmful solar and cosmic radiation. This has been proposed as the cause of the Ordovician–Silurian extinction, which resulted in the death of nearly 60% of the oceanic life on Earth. [ link to en.wikipedia.org]
|
|
Please verify you're human:
|
|
Reason for copyright violation:
|