How did Edwin Hubble measure the distance to the Andromeda Galaxy?
A) He measured its parallax.
B) He applied main-sequence fitting to star clusters in Andromeda.
C) He applied the period-luminosity relation to Cepheid variables in Andromeda.
D) He measured its redshift and applied Hubble's Law.
E) He detected white dwarf supernovae in Andromeda.
Correct Answer:
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Q3: What is the major difference between an
Q6: What two quantities did Edwin Hubble compare
Q7: Which types of galaxies have a clearly
Q8: How was Edwin Hubble able to use
Q9: Which of the following is true about
Q9: The disk component of a spiral galaxy
Q10: Why are Cepheid variables important?
A) Cepheid variables
Q13: Why is the Hyades Cluster important for
Q15: What is Hubble's law?
A) The luminosity of
Q16: Most large galaxies in the universe are
A)elliptical.
B)spiral
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