Multiple Choice
The twentieth century opened with a major unresolved question among astronomers. This was the subject of the famous Shapley-Curtis debate. What was this question?
A) How old is the Milky Way Galaxy?
B) What is the nature of dark matter?
C) Is general relativity true?
D) Is the Milky Way Galaxy the whole universe, or only one of many galaxies?
Correct Answer:
Verified
Correct Answer:
Verified
Q2: The supermassive black hole at the center
Q3: The positrons near the galactic center can
Q4: Suppose one could examine a star and
Q5: An astronomer finds a very old astronomy
Q6: What is the motion of stars in
Q8: What is a galactic halo?<br>A) system of
Q9: What happens when the electron in
Q10: Where is the solar system located in
Q11: Which of these accurately describes the characteristics
Q12: The observational fact about a Cepheid variable