Book Creator

science

by ZiQi Chen

Pages 2 and 3 of 9

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Intruduction
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In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as a planet, moon, asteroid, or Lagrange point.
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Index
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1.
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1.definition about orbital mechanics and trajectories...................4

2.drawing...............................................................................................5

3.audio recording..................................................................................6

4.video.....................................................................................................7

5.Gif..........................................................................................................8

6.conclusion.............................................................................................9