Question
Read What is Dark Matter?
NASA
2012
Question 25
Why does the author compare galaxy clusters to "merry-go-rounds" in paragraph 4?
A. to show how quickly galaxies rotate in space
B. to show that galaxy clusters never stop revolving
C. to show how weight and position affect revolution speed
D. to show how common rotating galaxy clusters are in space
NASA
2012
Question 25
Why does the author compare galaxy clusters to "merry-go-rounds" in paragraph 4?
A. to show how quickly galaxies rotate in space
B. to show that galaxy clusters never stop revolving
C. to show how weight and position affect revolution speed
D. to show how common rotating galaxy clusters are in space
Answers
GPT-4o mini
The author likely compares galaxy clusters to "merry-go-rounds" to illustrate how weight and position affect revolution speed. In this analogy, the merry-go-round represents the gravitational dynamics at play within galaxy clusters, where the speed at which galaxies move depends on their distance from the center and their mass. Therefore, the correct answer is:
C. to show how weight and position affect revolution speed.
C. to show how weight and position affect revolution speed.