How Did Harlow Shapley Use the Period-Luminosity Relationship of RR

question 49

Multiple Choice

How did Harlow Shapley use the period-luminosity relationship of RR Lyrae variable stars to determine the size of the Milky Way galaxy?

• A)He found the distances to open clusters found throughout the disk of the galaxy.
• B)He found the distances to individual variables free-floating in the halo of the galaxy.
• C)He determined the proper motion of globular clusters in the outer disk of the galaxy.
• D)He found the distances to globular clusters distributed about the centre of the galaxy.

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Definitions:

Ego

In psychoanalytic theory, the part of the personality that mediates between the demands of the id, the superego, and reality.

Self-Concept

An individual's awareness and perception of their own personality traits, abilities, and characteristics, forming the basis of their self-identity.

Incongruence

The disparity between an individual's self-image and actual experiences, often leading to psychological discomfort.

Archetypes

Universal, instinctive themes and symbols present in the collective unconscious, proposed by Carl Jung, that shape human experiences and behaviors.