2019-08-01_Sky_and_Telescope

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KEPLER ANNIVERSARY by F. Michael Witkoski


58 AUGUST 2019 • SKY & TELESCOPE


This year marks the
400th anniversary of
Kepler’s Third Law of
Planetary Motion.

Planets


Governing


the


POLYHEDRAL SEPARATION
Kepler’s model of the solar system
relied on Platonic solids — im-
mutable polyhedra nested inside a
series of spheres thought to carry
the planets.
Free download pdf