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(I hope this is the correct subforum)

I was wondering if anyone can help me, I am hoping to show a derivation of the distance modulus

m - M = 5log(d/10)

It looks very similar to the m = m(sun) - 2.5log((L/L(sun)).(r(sun)/r)^2) so I'm assuming that they are somehow related but I'm not sure how exactly (ie: I can't find anything that says how - I'm guessing that the equation for absolute magnitude is similar and then the subtraction cancels out all the unknowns and sun values).

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# Distance modulus

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