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Astronomy A2
Question | Answer |
---|---|
How do stars form ? | by condensation, gravitational compression of nebula |
What is Solar Nebula | is huge, vast clouds of ice, gas and dust. |
About how long is our sun lifespan? | 12 billion years |
What are black holes ? | end of the life cycle of some supergiant stars. |
Distances in our universe are measured in __________ | light years |
What are light years ? | is the distance light travels in one year. |
If a star that massive or larger undergoes a super nova explosion, it may leave behind What ? | massive burned-out stellar remnant |
________ put out about 10,000 times much energy as the sun | Blue giant stars |
Stars have a finite lifespan and ______ _______ _______ | evolve over time |
Mass (size) of star controls how it evolves, its lifespan and ______ ________ | ultimate fate. |