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:

Direct Labor

The wages or expenses incurred for labor that is directly involved in the manufacturing of a product.

Process

A series of actions or steps taken in order to achieve a particular end in business or manufacturing.

Job Order

A work instruction or order for producing a specific quantity of a product or service according to customer specifications.

Conversion Cost

The combined costs of direct labor and manufacturing overheads associated with converting raw materials into finished products.