Pre-Lab Quiz:аParallax Posers

parallax animation

Discuss each question with your team. Be prepared to explain the reasoning behind your team's answers after the quiz.

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

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

3. How does stellar parallax depend on distance?
а а а -аthe farther the star, the larger its parallax
а а а -аthe farther the star, the smaller its parallax
а а а -аparallax is equal to 1/d, where d is the Earth-Sun distance
а а а -аparallax 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?
а а а - B is four times closer than E
а а а -аB is eight times closer than E
а а а -аB is twice as close to the observer as E
а а а -аE is twice as close to the observer as B
а а а -аB and E are the same distance from the observer

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