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Astronomy Review (2)

QuestionAnswer
What is the most accepted theory of how the universe formed? The Big Bang Theory.
What is a solar nebula? Vast clouds of ice, gas, and dust.
What is a galaxy? A collection of billions of stars.
Define singularity. A region where the force of gravity is so strong that not even light can escape.
How do we measure distances in the universe? By light years.
What is a light year? The distance it light travels in a year.
What is our sun's life span? 12 billion years.
All stars start as _____________. Solar nebulas.
What controls what a star evolves into? Its mass (size)
What diagram shows the relationship between absolute magnitude (brightness) in relation to their surface temperatures? The Hertzsprung – Russell (H-R)
Created by: hcps-cedenofa
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