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Unit 2 Lesson 2
| Question | Answer |
|---|---|
| Law of universal gravitation | |
| gravity | the force that attracts a body toward the center of the earth |
| orbit | the curved path of a celestial object or spacecraft around a star, |
| aphelion | the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun. |
| perihelion | the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. |
| solar nebula | The Solar Nebular Hypothesis describes the formation of our Solar System from a nebula cloud made from a collection of dust and gas |
| centripetal | the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. |