Inside of Galaxy Clusters, Which of These Components Contains About

question 25

Multiple Choice

Inside of galaxy clusters, which of these components contains about twice as much mass as the stars inside the cluster's galaxies?

• A) large numbers of cool, dark, brown dwarf stars floating in the galaxy cluster
• B) very hot intergalactic gas emitting X-rays in clusters.
• C) a tremendous flux of neutrinos, which have recently been shown to have mass, coming from these clusters.
• D) large numbers of small but massive black holes within every galaxy.

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Definitions:

Absolute Thresholds

The minimum intensity of stimulation required to detect a particular sensory input 50% of the time.

Peripheral Vision

The part of vision that occurs outside the very center of gaze, allowing for the detection of stimuli and movement in a wider field around the direct line of sight.

Wavelength

The distance between successive crests of a wave, often used to describe the physical properties of electromagnetic waves such as light and radio waves.

Purity

The state of being free from contaminants, adulterants, or imperfections; often used in moral or ethical contexts.