[PDF] Hausordnung - Kepler

What are Kepler's laws?

Kepler's laws state that the sun is located at one of the two foci. The other focus is known as an 'empty' focus. Both the foci are located on the major or long axis of the ellipse. Show more... Kepler had 3 laws. #1-Planets move in ellipses with the sun at one focus. #2-A planet moves faster when closer to the sun and slower when farther away.

Why did Kepler abandon uniform circular motion?

[Kepler] had begun with physical principles and had then derived a trajectory from it, rather than simply constructing new models. In other words, even before discovering the area law, Kepler had abandoned uniform circular motion as a physical principle." ^ By 1621 or earlier, Kepler recognized that Jupiter's moons obey his third law.

What does Kepler mean by planetary orbit?

In this work Kepler introduced the revolutionary concept of planetary orbit, a path of a planet in space resulting from the action of physical causes, distinct from previously held notion of planetary orb (a spherical shell to which planet is attached).

Why was Kepler important?

Kepler’s discoveries turned Nicolaus Copernicus ’s Sun-centred system into a dynamic universe, with the Sun actively pushing the planets around in noncircular orbits. And it was Kepler’s notion of a physical astronomy that fixed a new problematic for other important 17th-century world-system builders, the most famous of whom was Newton.