If Elliptical Galaxies Do Not Have Cold Gas Clouds for Which

question 27

Multiple Choice

If elliptical galaxies do not have cold gas clouds for which we can measure the Doppler shift, then how can we measure the mass of an elliptical galaxy?

• A) by measuring the speeds of stars in the nucleus
• B) by observing the velocity of the hot, X-ray emitting gas that surrounds the galaxy
• C) by measuring the number of H II regions in the galaxy
• D) by measuring how many supernovae go off each century
• E) by measuring the amount of blue light in the galaxy

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Definitions:

Sternberg's Consummate Love

A concept from Robert Sternberg's Triangular Theory of Love, referring to a complete form of love consisting of three components: intimacy, passion, and commitment.

Intimacy

The closeness between individuals in personal relationships, characterized by mutual affection, emotional connection, and trust.

Cognitive-Dissonance Theory

The view that we are motivated to make our cognitions or beliefs consistent with each other and with our behavior.

Effort Justification

In cognitive-dissonance theory, the tendency to seek justification (acceptable reasons) for strenuous efforts.