Multiple Choice
How have astronomers measured the mass of the black hole at the center of our galaxy?
A) Using the rotation curve derived from 21-cm emission
B) By observing the motions of stars near the center of the galaxy
C) By measuring the brightness of the quasar
D) By measuring the Doppler shift of Sagittarius A*
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q6: Explain how a standard candle allows you
Q31: The Milky Way has two major spiral
Q52: In which part of the Milky Way
Q55: If we found gas at the edge
Q56: Sagittarius A*,the radio source located at the
Q58: Why is 21-cm radiation the best way
Q59: Every open star cluster in the Milky
Q60: Because of the ages of globular clusters
Q62: What observed property of the Milky Way
Q73: Our galaxy is classified as an Sd