Multiple Choice
A Cepheid variable is observed in a galaxy 1 Mpc distant. Its apparent magnitude of 19.8 corresponds to a brightness ratio of b/bŸ = 2.35 x 10-19. What is its period?
A) 10 days
B) 20 days
C) 30 days
D) 45 days
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q55: Which common household phenomenon represents a close
Q56: Parallax and masers are two techniques for
Q57: What assignment is given to a galaxy
Q58: Which of the following properties would NOT
Q59: What is distinctive about the Coma Cluster
Q61: The Hercules Cluster of galaxies shown
Q62: Type Ia supernovae are frequently used as
Q63: Why is the Tully-Fisher relation NOT used
Q64: Which of the following sequences shows the
Q65: Whether or not a galaxy has a