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:

Autonomy Versus Shame

A stage in Erik Erikson's theory of psychosocial development where toddlers learn to exercise their will and do things for themselves, or they doubt their abilities.

Heredity And Environment

The interplay between genetic predispositions and external factors that shapes individuals' traits, behaviors, and development.

Generativity Versus Self-Absorption

A stage in Erik Erikson’s theory of psychosocial development where middle-aged adults face the challenge of contributing to the next generation or becoming self-centered.

Industry Versus Inferiority

A stage in Erik Erikson's theory of psychosocial development, typically occurring during childhood, where success fosters a sense of competence, while failure results in feelings of inferiority.