How many times is Sirius brighter than Aldebaran? Is the sun brighter than Sirius?

I-Sirius I1 / I2 = 2.512 m2-m1 = 2.512 1.06 – (- 1.6) = 2.512266
II-Aldebaran I1 / I2 = 11, 68
III-Sun I3 / I1 = 2.512 m1-m2 = 2.512 -1.6 – (- 26) = 2.512 24.4
m1 = -1.6 I3 / I1 = 5.76 * 10 9
m2 = 1, 06 Answer: Sirius is 11.68 times brighter than Aldebaran;
m3 = – 26 The sun is 5, 76 * 10 9 times brighter than Sirius.

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