The Identification of "Spiral Nebulae" as Large Groupings of Stars

question 52

Multiple Choice

The identification of "spiral nebulae" as large groupings of stars outside of our own galaxy was proven by ____.

• A) photographic plates made by Edwin Hubble showing stars and Cepheid variables
• B) the results of the Shapley-Curtis debate
• C) Immanual Kant's "island universe" theory
• D) William Parsons' observation and description of their spiral structure
• E) Harlow Shapley's observations of their radio spectrum

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Definitions:

Idiosyncratic

Peculiar or unique characteristics; aspects that are distinctive to an individual or specific entity, deviating from the norm.

Human Relationships

The connections and interactions between individuals, encompassing a broad range of dynamics including friendship, family ties, and romantic partnerships.

Affiliation

The connection or association with a group or organization, often for mutual benefit or shared identities.

Human Contact

The physical or interpersonal interaction between individuals, emphasizing the importance of social connections and touch in human development and well-being.