How Did Edwin Hubble Definitively Prove That "Spiral Nebulae" Were

question 78

Essay

How did Edwin Hubble definitively prove that "spiral nebulae" were individual galaxies that were separate from the Milky Way?

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Definitions:

Clinical Community Psychologist

A specialist in psychology who integrates clinical and community approaches to enhance individual and collective well-being and address social issues.

Primary Prevention

Strategies and actions taken to prevent the onset of disease or injury before it occurs.

At-Risk Youth

Young individuals considered vulnerable to negative outcomes such as dropout, substance abuse, or criminal behavior due to their environment, social status, or personal circumstances.

Prefrontal Lobotomy

A surgical procedure once used to treat mental illness, involving the removal or severing of connections in the brain's prefrontal cortex.