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Author Question: What evidence supports the existence of a black hole at the center of our galaxy? A) The motions ... (Read 43 times)

nmorano1

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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


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ryrychapman11

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

rotation


nmorano1

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Reply 2 on: Jul 27, 2018
:D TYSM

emsimon14

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Reply 3 on: Yesterday
Excellent

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