How can astronomers determine the mass of the Sun?
What will be an ideal response?
Question 2What is proper motion?
A) It is the true, not apparent, motion of a star in space.
B) It is the apparent shift as we go to opposite sides of our orbit every six months.
C) It is the annual apparent motion of a star across the sky.
D) It is the motion of a star towards or away from us, revealed by Doppler shifts.
E) It is the orbital motion of a star around the Galaxy.
Question 3How does Drake define a technological civilization?
A) one that can get into space
B) one that can communicate over interstellar distances
C) one that has a written language
D) one that can construct metal tools
E) one that can have the intelligence not to destroy itself
Question 4What spectral type of star that is still around formed most recently?
A) O
B) A
C) F
D) K
E) M
Question 5If it were about 80 times as massive as present, Jupiter could become a star.
Indicate whether the statement is true or false
Question 6What are two advantages of large scopes over smaller ones?
A) Large scopes have a larger field of view and sharper focus.
B) Large scopes are not subject to atmospheric turbulence and opacity like smaller ones.
C) Large scopes are easier to mount and control than small ones.
D) Large telescope have more light grasp and better resolution.
E) Large telescopes give higher magnification and are easier to build.
Question 7A supernova that occurred 30,000 years ago in a galaxy 100,000 light years away will be observed on Earth:
A) 30,000 years from now.
B) 70,000 years ago.
C) 70,000 years from now.
D) 100,000 years ago.
E) 100,000 years from now.
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