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Whose principles explain the motion of planets around the Sun?
ScienceAstronomy
Quick Answer
Johannes Kepler’s laws of planetary motion describe how planets move around the Sun. They were published between 1609 and 1619.
The Full Story
Johannes Kepler, using observations made by Tycho Brahe, formulated three laws of planetary motion. These laws show that planets move in elliptical orbits, sweep out equal areas in equal times, and have a relationship between orbital period and distance from the Sun. Kepler published major parts of this work in 1609 and 1619. His laws became essential to later Newtonian astronomy.
Key Facts
1.1609: first two laws published
2.1619: third law published
3.Planets move in ellipses, not perfect circles
YouTube Angle
Suggested video title for this topic:
"Why planets don’t orbit in perfect circles"