What type of standard candles did Shapley use to determine distances to globular clusters?
A) O-type main-sequence stars
B) Cepheid variable stars
C) T Tauri stars
D) Type Ia supernovae
E) RR Lyrae stars
Correct Answer:
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Q5: The dark bands pictured in the figure
Q6: The most distant globular clusters are found
Q7: Spiral arms are
A) solid features.
B) clumps of
Q8: Why is 21-cm radiation one of the
Q9: If dust is present between Earth and
Q11: The Sun is located approximately
A) halfway out
Q12: Any single star in the Milky Way
Q13: Somebody shows you the picture in the
Q14: Halo stars near the Sun are distinguished
Q15: Spiral arms are generated by
A) bipolar jets
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