1. Pretend that galaxies are spaced evenly, 2 Mpc apart, and the average mass of a galaxy is 10… 1 answer below »

1. Pretend that galaxies are spaced evenly, 2 Mpc apart, and the average mass of a galaxy is 1011 solar masses. What is the average density of matter in the universe? (Hints: The volume of a sphereand the mass of the sun is 2 × 1030 kg.) 2. Hubble’s first estimate of the Hubble constant was 530 km/s/Mpc. His distances were too small by a factor of about 7 because of a calibration error. If he had not had that calibration problem, what value for H would he have obtained?  

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