Multiple Choice
What is SgrA*?
A) a source of bright X-ray emission coming from the entire constellation of Sagittarius
B) a source of bright radio emission in the center of our galaxy
C) a source that is bright in the visible wavelengths in the center of our galaxy
D) the brightest star in the constellation Sagittarius
E) the bulge at the center of our galaxy
Correct Answer:

Verified
Correct Answer:
Verified
Q90: Suppose you want to observe and study
Q91: The average speed of stars relative to
Q92: Why do we believe that most of
Q93: If we could watch spiral arms from
Q94: Elements heavier than hydrogen and helium constitute
Q96: Why are we unlikely to find Earth-like
Q97: Observing the galaxy at radio wavelengths allows
Q98: Which of the following statements is not
Q99: Most of the current star formation in
Q100: How do we learn about what is