Suppose that with a certain small telescope and camera combination, we can detect stars with apparent brightness as faint as 15th magnitude. How far away could a supernova occur and still be detected with this equipment if its absolute luminosity were 1010 times brighter than our Sun?

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     870 light-years
      2.5 billion light-years
      420 thousand light-years
      360 million light-years
      15 million light-years
asked Sep 20, 2012 in Astronomy by anonymous

1 Answer

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360 million light-years
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)

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