How Did Edwin Hubble Measure the Distance to the Andromeda

question 123

Multiple Choice

How did Edwin Hubble measure the distance to the Andromeda Galaxy?

• A) He measured its parallax.
• B) He applied main-sequence fitting to star clusters in Andromeda.
• C) He applied the period-luminosity relation to Cepheid variables in Andromeda.
• D) He measured its redshift and applied Hubble's Law.
• E) He detected white dwarf supernovae in Andromeda.

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Physical and Emotional Needs

Basic requirements that must be fulfilled to maintain physical health and emotional well-being, including food, shelter, love, and belonging.

Motivate Behavior

The process of influencing or encouraging individuals to act or behave in a certain way.

Morphogen

Substance that regulates development; secreted by one cell type and affects other cells in a concentration-dependent manner.

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A term used to describe processes or reactions that vary according to the concentration of a particular substance involved.