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The Main Difference Between Cepheid Stars and RR Lyrae Stars

Question 28

Multiple Choice

The main difference between Cepheid stars and RR Lyrae stars is:


A) their masses
B) that Cepheids form at much greater distances from Earth
C) that RR Lyrae were discovered much earlier than Cepheids
D) their pulsation mechanisms
E) that Cepheids obey a period-luminosity relation, but RR Lyraes do not

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