What is Kepler's First Law?
Keplers Laws

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Science
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9th Grade
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Medium
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1.
FLASHCARD QUESTION
Front
Back
A planet moves in an elliptical orbit with the Sun at one of the two foci.
2.
FLASHCARD QUESTION
Front
What does Kepler's Second Law state?
Back
A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
3.
FLASHCARD QUESTION
Front
What is Kepler's Third Law?
Back
The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
4.
FLASHCARD QUESTION
Front
Define eccentricity in the context of orbits.
Back
Eccentricity is a measure of how much an orbit deviates from being circular; it ranges from 0 (circle) to 1 (parabola).
5.
FLASHCARD QUESTION
Front
What is the shape of a planet's orbit according to Kepler's Laws?
Back
An ellipse.
6.
FLASHCARD QUESTION
Front
What are the two points called that define the foci of an ellipse?
Back
Foci.
7.
FLASHCARD QUESTION
Front
What happens to a planet's speed as it approaches the Sun?
Back
The planet moves faster as it gets closer to the Sun.
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