Worksheet: Measuring Distances to Distant Objects

In this worksheet, we will practice using different methods for calculating the distances to other stars and galaxies.


Calculate the approximate age of the universe from the average value of the Hubble constant, 𝐻=20 km/s⋅Mly. To do this, calculate the time it would take to travel 0.307 Mpc at a constant expansion rate of 20 km/s.

  • A1.0×10 years
  • B1.5×10 years
  • C1.3×10 years
  • D1.1×10 years
  • E1.7×10 years


What is the average distance from the Milky Way to galaxies that are moving away from it at 3.00% of the speed of light?

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