What Is the Evidence That Indicates to Some Astronomers That

question 203

Multiple Choice

What is the evidence that indicates to some astronomers that a supermassive black hole exists at the center of the Milky Way Galaxy?

• A) A Doppler shift of light from stars in the near neighborhood of the galactic center indicates that the stars are falling inward at very high speeds.
• B) The Sun's motion in space shows that, if Kepler's law holds for its orbit around the galactic center, there must be a very massive object at the center of the Milky Way.
• C) No electromagnetic radiation at all comes from the precise position of the galactic center, and it just looks like a dark void in space.
• D) Measurement of gas clouds orbiting the galactic center at very high speeds indicates that they would rapidly move out of the Galaxy unless some very massive object were holding them in orbit.

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Definitions:

Emotional Effect

pertains to the impact of emotions on an individual's cognitive processing, behavior, and physiological state.

Depression

a mental health disorder characterized by persistent feelings of sadness, loss of interest in activities, and various emotional and physical problems, significantly affecting daily functioning.

Behavioral

Relating to the actions or reactions of a person or animal in response to external or internal stimuli, often studied in psychology and behavioral sciences.

Mental

Relating to the mind or psychological processes.