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Why is Kepler’s third law so important in astrophysics?

Because it helps us understand the relationship between a planet’s distance from the sun and the time it takes to complete a full orbit. Kepler’s laws also laid the foundation for modern astrophysics, paving the way for scientists such as Newton and Einstein. Kepler’s third law is still in use today, for instance, NASA can use it (with some added computation) to plan a satellite’s orbit around the earth.

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