Solved

-Refer to the Figure

Question 10

Multiple Choice

-Refer to the figure.Why is it more difficult to measure the distances to globular clusters (which contain RR Lyrae stars) than the distances to open clusters (which contain Cepheids) ? A) RR Lyrae stars are dimmer and harder to see. B) RR Lyrae stars pulsate so fast that they can't be measured. C) RR Lyrae stars are further away than Cepheids. D) RR Lyrae stars do not have a relationship between period and luminosity.
-Refer to the figure.Why is it more difficult to measure the distances to globular clusters (which contain RR Lyrae stars) than the distances to open clusters (which contain Cepheids) ?


A) RR Lyrae stars are dimmer and harder to see.
B) RR Lyrae stars pulsate so fast that they can't be measured.
C) RR Lyrae stars are further away than Cepheids.
D) RR Lyrae stars do not have a relationship between period and luminosity.

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q5: Before the twentieth century,astronomers lacked knowledge of

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

Q12: Old stars are poor in heavy atoms

Q13: The disk of the Milky Way is

Q14: If other galaxies are like the Milky

Q15: Describe the central few light-years of our

Q58: The _ of the galaxy contains population