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
Q16: Which of the following statements is NOT
Q18: In which part of the Milky Way
Q19: The Milky Way Galaxy is a(n)_ galaxy.
A)
Q20: Globular clusters,when compared to open clusters,generally:
A) are
Q22: The fact that the Milky Way has
Q23: Observations of Doppler shifts toward the center
Q24: Which of the following statements about the
Q25: Which of the following is closest to
Q35: Why is 21-cm radiation the best way
Q52: What is the main observational difficulty in
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents