Supernova may wipe out the Earth

3,260 light-years? Light travels at a hundred and 86 thousand miles A SECOND. Doesn't seem that close. It takes the light from the sun to Pluto more than 5 hours. This is over 3200 light years? Also, my understanding is the energy shoots out of two cones, one at either end of it's magnetic poles. To have one of those aimed directly at us from over 3 thousand light years away would be very unlucky indeed.

Supernova

Rdean, you are referring to a Gamma Ray Burst(er) the affect of which is focused along the polar magnetic field lines of the star. This is another possible affect from the explosion of a super massive star AKA supernova.

But more relevant: In our Milky Way galaxy, about 800 light years away and about 11,400 years ago, a supernova exploded in the constellation Vela. This is four times or one fourth as distant as the T Pyxidis object.

The Distance to the Vela Supernova Remnant was measured by Cha, Sembach, and Danks...

People on earth saw the explosion about 11,000 years ago as a star of magnitude -10, as bright as a 7-day old Moon.

Seen below: is a representation of a supernova beginning as a super-massive blue star and ending as a rapidly rotating neutron star that can be observed many years later as a radio pulsar.

supernova.gif
 

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