How Do Astronomers Know That the Nuclei of Some Galaxies

question 28

Multiple Choice

How do astronomers know that the nuclei of some galaxies are active?

• A) Their nuclei are much brighter than expected.
• B) The orbits of stars near the center of the galactic nuclei are faster than expected.
• C) The luminosity of the nuclei varies over time.
• D) The color of the nuclei is different than expected.

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Definitions:

Psychographic Basis

The classification of potential customers based on psychological characteristics, such as attitudes, values, lifestyles, and personality.

Product Attributes

Refer to the characteristics and features that define a specific product, including its appearance, quality, and functionality.

Competitive Comparisons

Analysis that involves comparing one company's products, services, or performance against those of its competitors.

Service Tailoring

The adaptation of a service to meet the specific needs or preferences of different customer segments.