Dr. Brian Thomas
Washburn University
Astrophysics and Life on Earth
102 Cardwell Hall
November 26, 2012
4:30 p.m.
The Earth constantly receives radiation from
astrophysical objects and events. The Sun, of course, produces a constant
stream of photons and charged particles that both benefit and harm life on
our planet. More energetic but short lived solar events can have larger
effects. In addition, astrophysical events far beyond the borders of our
solar system can have major effects on the Earth. These events are much
less frequent, but much more energetic, and may have connections to one or
more of the extinction episodes in the history of life. I will review what
we know about the various astrophysical events that could be significant,
how often they may occur and what the effects are or would be on the Earth's
atmosphere and biosphere.
Refreshments in CW 119 at 4:15 p.m.