Phys GeoG, Test 1 pt 3

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Last updated 4:11 PM on 9/15/26
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8 Terms

1
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galaxy

a collection of stars

2
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planetesimal

fragments that form planets

3
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spurs

denser regions of a galaxy with more stars

4
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what does a light year measure?

distance

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how long does it take for a star to travel from one end of a galaxy to the other end?

100,000 light years

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nuclear fusion

brings things together

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sun’s energy

hydrogen fuses together to create helium

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hydrogen

water maker