The Broadening of Spectral Lines Due to the Collective Doppler

question 437

Multiple Choice

The broadening of spectral lines due to the collective Doppler shifts of objects orbiting the center of the Milky Way Galaxy suggests that the mass at the center of the Galaxy is about 4 million solar masses.What is believed to be the diameter of this supermassive object?

• A) about half a parsec
• B) about 8 ly
• C) about the diameter of the solar system
• D) smaller than the diameter of the Sun

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Definitions:

Prosopagnosia

A neurological condition characterized by the inability to recognize faces, also known as face blindness.

Visual-form Agnosia

A neurological condition where a person can see objects but cannot recognize their shape, leading to an inability to identify the objects based on their forms.

Glaucoma

Glaucoma is a group of eye conditions that damage the optic nerve, often associated with abnormally high pressure in the eye and can lead to loss of vision if not treated.

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A type of color blindness in which there is a difficulty in distinguishing between red and green colors due to the absence or malfunctioning of the red cones in the eye.