Worksheet: Stars, Galaxies, and the Universe

In this worksheet, we will practice describing some important objects in the universe.


Which star is closest to Earth?

  • AProxima Centauri
  • BBarnard’s Star
  • CAlpha Centauri
  • DThe Sun


The Sun is around 150 million kilometers from Earth. It takes about eight minutes for light from the Sun to reach our planet.

Light can travel 6 trillion miles in a year. What is the unit of measurement astronomers use to record the distance that light travels in one year?

  • AMiles
  • BLight-years
  • CKilometers
  • DMeters

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