If a galaxy contains a supernova that at its brightest has an apparent magnitude of +25, how far away is the galaxy? Assume that the absolute magnitude of the supernova is -14.
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If a galaxy contains a supernova that at its brightest has an apparent magnitude of +25, how far away is the galaxy? Assume that the absolute magnitude of the supernova is -14. (Hint: use the magnitude - distance formula : d = 10 (Mv-Mv +5)/5
_______ Mpc
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