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Old 09-08-2011, 10:11 PM
pj67coll pj67coll is offline
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Join Date: Apr 2003
Location: Phoenix Arizona. Ex Durban R.S.A.
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Quote:
Originally Posted by davidmash View Post
If I am understanding this correctly a light year is the distance it takes light to travel in one year. Since this is 21 million light years away, this supernova occurred 21 million years ago?

Hard to wrap your head around numbers like that.
Correct. Astronomy is a humbling thing.

- Peter.
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