Question

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What makes apparent magnitude different from absolute brightness? Give an example in your response.

Answer 1

A glance at the night sky above Earth shows that some stars are much brighter than others.Astronomers define star brightness in terms of apparent magnitude how bright the star appears from Earth and absolute magnitude how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.

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Answer 2

It is the apparent magnitude of an object if it were 32.6 light years away (that's equivalent to 10 parsecs) from us and in the absence of any sources that could interfere with its brightness– these sources being the dust and gas in the Universe that absorbs or scatters emitted light.