Author Question: What evidence supports the existence of a black hole at the center of our galaxy? A) The motions ... (Read 19 times)

nmorano1 · **on:** Jul 27, 2018

What evidence supports the existence of a black hole at the center of our galaxy?

A) The motions of the gas and stars at the center indicate that it contains 4 million solar masses within a region only 3 light-years across.
B) We observe a large, dark object that absorbs all light at the center of our galaxy.
C) We can see gas falling into an accretion disk and past the event horizon of a black hole.
D) We observe an extremely bright X-ray source at the center of our galaxy.
E) All of the above

Question 2

The Tully-Fisher relation uses the ________ of the spiral to find its luminosity.

Fill in the blank(s) with correct word