Discussion Questions: How Big Is Our Universe?
- What did you find that helped you gain a sense of the size and distance in the universe?
- How is looking at a distant galaxy similar to looking back in time?
- Explain how photographing a group of stars at six-month intervals provides evidence that some stars are closer to Earth than others.
- Using a scale that makes the Sun the size of a quarter, how far from the Sun is each of the planets?
- Why is it so hard to make models of the solar system to scale by both size and distance?
