Tycho Brahe - The Tychonic Model - Scientific
Revolution - Dr Robert A. Hatch
POST-COPERNICAN MODELS & VARIATIONS
Dr Robert A. Hatch - University
accounts Johannes Kepler was a brilliant astronomer and mathematician.
He is remembered, in particular, for his three laws of planetary motion,
which continue to grace the pages of modern survey texts in astronomy.
For all that, Kepler was also something of a mystic and freethinker.
Among his ideas not found in modern textbooks is the belief that the Five
Regular Solids (three-dimensional geometrical objects with identical sides,
for example a cube) account for the five intervals between the six known
planets. The illustration above shows how the five solids were nested
one within the other to account for the number and the distances of the
planets from the Sun. The illustration below provides a similar description
detailing the place of each of the Five Regular Solids.
be clear from the above illustration, Kepler maintained that the Five Regular
Solids (specifically, the octahedron, icosehedron, dodecahedron, tetrahedron,
and finally, the familiar cube) account for the intervals of space between
the planets. Surprisingly (or not) Kepler was able to make the ratios
work with fair accuracy, though the failure with one of the planets seems
to have been a motive for his accepting a position with Tycho Brahe, the
Prince of Astronomers. Kepler's theory of the Five Regular Solids
first appeared his his Mysterium Cosmographicum (1596 - the Mystery
of the Universe). Evidence suggests Kepler believed in the efficacy
of this theory all of his life, that is, it held equal weight with his
so-called three laws of planetary motion.
Dr Robert A. Hatch - All Rights