Multiple Choice
Before the twentieth century,astronomers lacked knowledge of something,and this caused them to think that the Sun was at the centre of our star system.What was that something?
A) globular clusters
B) Cepheid variable stars
C) the dimming effects of gas and dust
D) galactic rotation
Correct Answer:

Verified
Correct Answer:
Verified
Q1: Harlow Shapley found the distance to the
Q2: How did Harlow Shapley determine where the
Q3: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1453/.jpg" alt=" -Refer to the
Q4: What does the chemical abundance found in
Q6: Who first noticed that for Cepheid variable
Q7: The centre of our galaxy shows signs
Q8: Why do younger stars have more heavy
Q9: _ are groups of 100,000 to 1,000,000
Q10: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1453/.jpg" alt=" -Refer to the
Q58: The _ of the galaxy contains population