Much of the Mass in Galaxies and Clusters of Galaxies

question 42

Multiple Choice

Much of the mass in galaxies and clusters of galaxies is dark matter.All of the techniques below are means of detecting evidence of this dark matter EXCEPT ONE.Which is the exception?

• A) measuring the speed of stars in their orbits around a galactic center
• B) gravitational lensing of very distant galaxies by a nearby galaxy (or cluster) and its accompanying dark matter
• C) observing the aftermath of a collision such as that in galaxy cluster 1E0657-56
• D) observing X rays being emitted from the space between galaxies in rich clusters

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Definitions:

Subjective Well-Being

An individual's self-assessment of their own happiness and life satisfaction, considering factors like emotional and cognitive judgments.

Extraverted

Oriented towards the external environment, characterized by sociability, talkativeness, and a desire for external stimulation.

Introverted

A personality trait characterized by a focus on internal feelings rather than external sources of stimulation.

Self-Determination Theory

The theory that three basic psychological needs including autonomy, competence, and relatedness motivate our adaptation efforts at any age.