Who First Used RR Lyrae Variable Stars to Determine Distances

question 57

Multiple Choice

Who first used RR Lyrae variable stars to determine distances in our Milky Way galaxy

• A)Henrietta Leavitt
• B)Edwin Hubble
• C)John Glenn
• D)Carl Sagan
• E)Harlow Shapley

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Definitions:

Efficiency-Enhancing Unionism

A perspective on labor unions that posits they can contribute to improved efficiencies in the workplace through cooperative relationships and practices that enhance productivity.

Social Movement Unionism

An approach to unionism that combines labor organizing with broader social and political objectives, often aligning with other social movements.

Collaborate

The process of two or more people or organizations working together to complete a task or achieve a goal.

Efficiency-Enhancing Unionism

A perspective on labor unions suggesting that they can lead to positive outcomes for both employers and employees by improving work processes and productivity.