Worksheet: Measuring Distances to Distant Objects

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

Q1:

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

Q2:

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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