## Pre-Lab Quiz: Parallax Posers Discuss each question with your team. Be prepared to explain the reasoning behind your team's answers after the quiz.

1. Stellar parallax is
- the distance a star travels in a year.
- the apparent motion of a star over a year.
- the distance between the Earth and the Sun.
- the distance from Earth to a nearby star.

2. Which of the following is TRUE?
- Parallax is the result of the Sun's gravity bending light.
- The distance to nearby galaxies was first found using their parallax.
- All stars exhibit parallax.
- Stars farther than ~10,000 parsecs are fixed and have no parallax.

3. How does stellar parallax depend on distance?
- the farther the star, the larger its parallax
- the farther the star, the smaller its parallax
- parallax is equal to 1/d, where d is the Earth-Sun distance
- parallax does not depend on distance Use the image above to complete the following questions.

4. Assuming the balloons are the same size, which is closest to the observer?

5. Assuming the balloons are the same size, which is farthest away?

6. Still assuming the balloons are the same size, where are B and E in relation to each other?
- B is four times closer than E
- B is eight times closer than E
- B is twice as close to the observer as E
- E is twice as close to the observer as B
- B and E are the same distance from the observer