The distance that the supernova is from Earth would affect how much it effects us. If our sun were to go supernova at this moment, there would be a seven minute delay until the light from the nova reaches us. It is likely that a "shock wave" would be produced and the earth would probably be destroyed very soon after we realize that a super nova has happened.
- If a supernova occurred in Alpha Centauri, it would take 4 years for us to realize so, and the effects from such supernova are yet unknown, but would probably include an increase in radiation entering our solar system.
- It is likely that our Sun's magnetosphere would prevent a large amount of the radiation from getting into the solar system. It is also unlikely that any matter would have enough momentum to travel the 4 light years between Alpha Centuari and Sol (our sun).\
- Any super nova that occurs outside our own solar system would normally only increase the amount of radiation that impacts that magnetosphere. Supernovas that have occurred in the Milky Way Galaxy, in the past have had very little effect on Humans here on Earth.
Born In The Wake Of Supernova (Source: youtube)
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