View source for Kepler's 2nd law

'''Johannes Kepler''' (b. 1571)

''''' Kepler's laws of planetary motion''''' 1609-1619

A line joining a planet and the Sun sweeps out equal areas during equal intervals of time.

: $$\frac{d\theta}{dt} \propto \frac{1}{r^2}$$

== Resources: ==

*[https://en.wikipedia.org/wiki/Kepler's_laws_of_planetary_motion#Second_law_of_Kepler Kepler's 2nd law]

== Discussion: ==
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