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4 cards from this section. Quick, good the night before a test.
What is a nebula?
Think about where stars are created.
How long is a light-year in kilometers?
Consider the speed of light and how far it travels in a year.
What is the primary role of nebulae in the universe?
Remember the definition of a nebula.
True or False: A light-year is a measure of time.
Think about how light travels and what a year represents.
If a nebula is 12 light-years away, how long does it take light from that nebula to reach us?
Use the definition of a light-year.
Explain the relationship of gravitational forces and density in the formation of stars and give an example.
Consider key terms and their impacts on star formation.
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