Globular Clusters Can Be Used to Estimate the Distance to Galaxies

question 22

Multiple Choice

Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____.

• A) angular diameter
• B) mass
• C) orbital speed
• D) age
• E) recession velocity

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Definitions:

Retrograde Amnesia

A loss of memory-access to events that occurred, or information that was learned, before an injury or the onset of a disease.

Explicit Memory

Memory in which there is conscious recall of facts and events.

Episodic Memory

A subtype of long-term memory that involves the recollection of specific events, situations, and experiences, including their contexts and associated emotions.

Classical Conditioning

A learning process that occurs when two stimuli are repeatedly paired; a response that is initially elicited by the second stimulus is eventually elicited by the first stimulus alone.