ASTRONOMY 205 QUIZ AND ANS 2025

ASTRONOMY 205 QUIZ AND ANS 2025


The average distance between Earth and the Sun.-CORRECT ANSWERS✔✔What is an astronomical unit
(AU)?



the distance that light travels in a vacuum in one Earth year (equal to about 10 trillion km)-CORRECT
ANSWERS✔✔A light-year (ly) is ______________.



The Solar System is much much much smaller than the Milky Way Galaxy.-CORRECT ANSWERS✔✔
Which of these statements is correct?

- The Solar System is much much much smaller than the Milky Way Galaxy.

- It is impossible to measure the size of the Solar System or the size of the Milky Way Galaxy.

- The Solar System is a bit bigger than the Milky Way Galaxy.

- The Solar System and the Milky Way Galaxy are approximately the same size.



5-CORRECT ANSWERS✔✔Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as
Galaxy 2. In that case, which of these statements must be true?

1- Galaxy 2 must be twice as old as Galaxy 1.

2- Galaxy 1 must be twice as big as Galaxy 2.

3- We are seeing Galaxy 1 as it looked at a later time in the history of the

Universe than Galaxy 2.

4-We are seeing Galaxy 1 as it looked at an earlier time in the history of the Universe than Galaxy 2.