Why Were Cepheid Variables Essential to the Discovery of Galaxies

question 14

Essay

Why were Cepheid variables essential to the discovery of galaxies outside the Milky Way?

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Definitions:

Independent Contractors

Individuals or entities hired to perform specific tasks or services for a company under a contract, without being considered employees of the company.

Principal's Right

This term involves the legal entitlements that a principal (the person for whom an agent acts) holds, especially in matters of agency law, such as the right to direct the agent and be accountable for the agent's acts.

Agent's Performance

Refers to the manner in which an agent conducts their duties on behalf of a principal, typically in a business or legal context.

Subagent

An agent appointed by another agent with the approval of the principal to perform tasks under a delegated agency agreement.