Kepler's laws

British  

plural noun

1. three laws of planetary motion published by Johannes Kepler between 1609 and 1619. The first states that the orbit of a planet describes an ellipse with the sun at one focus. The second states that, during one orbit, the straight line joining the sun and a planet sweeps out equal areas in equal times. The third states that the squares of the periods of any two planets are proportional to the cubes of their orbital major axes

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Example Sentences

"Over decades, Tycho Brahe collected astronomical observations from which Kepler, with lots of trial and error, was able to extract Kepler's Laws. Dion used machines to do with waves what Kepler did with planets. For me, it is still shocking that something like this is possible," says Markus Jochum.

From Science Daily

HR 5183 b spends most of its time loitering in the outer part of its star’s planetary system, then it accelerates and slingshots around its star, consistent with Kepler's laws of planetary motion.

From Salon

When we send spacecraft to the planets, when we observe double stars, when we examine the motion of distant galaxies, we find that throughout the universe Kepler’s laws are obeyed.

From Literature

All three of Kepler’s laws of planetary motion can be derived from Newtonian principles.

From Literature

Kepler’s laws were empirical, based upon the painstaking observations of Tycho Brahe.

From Literature