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Astronomy Review (2)
Question | Answer |
---|---|
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) |