How Was Edwin Hubble Able to Use His Discovery of a Cepheid

question 8

Multiple Choice

How was Edwin Hubble able to use his discovery of a Cepheid in Andromeda to prove that the "spiral nebulae" were actually entire galaxies?

• A)There are no Cepheids in the Milky Way,so his discovery proved that it had to be in another galaxy.
• B)He measured the stellar parallax of the Cepheid in Andromeda,was able to determine the distance to it,and showed that it was far outside the Milky Way Galaxy.
• C)From the period-luminosity relation for Cepheids,he was able to determine the distance to Andromeda and show that it was far outside the Milky Way Galaxy.
• D)Since a Cepheid is a type of luminous galaxy,when he found it in Andromeda he was able to prove that Andromeda was a separate galaxy from the Milky Way.

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Definitions:

Sales Returns and Allowances

A reduction in sales revenue that occurs when customers return goods or receive allowances for unsatisfactory goods, impacting the net sales figure.

Merchandise Inventory

Goods or products that a company holds for the primary purpose of selling them to customers.

Sales Returns & Allowances

Sales Returns & Allowances account for the reduction in sales due to products being returned or allowances provided for damaged goods.

Merchandise Inventory

Goods that a business holds for the purpose of selling to customers, often part of the current assets on a company's balance sheet.