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WD_240/ 2006
(  Satoshi Kinoshita )
| Series: | Works on paper: Drawings 3 | | Medium: | oil pastel on paper | | Size (inches): | 30.1 x 21.3 | | Size (mm): | 765 x 542 | | Catalog #: | WD_0240 | | Description: | Signed, date and copyright in pencil on the reverse.
Johannes Kepler Publishes Harmony of the World - Date: 1619 A.D.
Author: Johannes Kepler, German Astronomer and Mathematician
Dear Journal,
Everything is starting to make sense now. God's laws are simple ones. From that day my mathematics professor Michel Maestlin lectured on Copernicus's heliocentricism, I have believed it. Even when Brahe took the middle road by saying that the planets revolved around both the sun and the Earth, I was not swayed. Though I say this with the utmost respect to the great Brahe, for it was his amassing of such enormous data that helped lead me to my conclusions. Now, building on Copernican theory, I have revised it using elliptical orbits instead of circular ones. The system I devised is more accurate in predicting planetary position. Harmonies of the World will show to many the simplicity and symmetry of God's universe.
-library.thinkquest.org/C0126520/chronothink/scie1619ad.htm
"Space Topics: Planetary Exploration Timelines - Prehistory to 1698" by A. J. S. Rayl, Courtney Dressing, and Emily Lakdawalla.
Some time before the beginning of recorded history, humans noticed that among the fixed stars that populated the night sky were five wanderers, which we now know as Mercury, Venus, Mars, Jupiter, and Saturn. Watching these wanderers as well as the motions of the Moon and the Sun formed the foundation of planetary science.
4000 B.C.E.
Egyptians create a 360-day calendar by correlating observations of the star Sirius with the annual flooding of the Nile. Between years, the Egyptians feast for a five-day period of celebration known as "the yearly five days." The five days of partying are not part of the 360-day year, which means that the Egyptians really use a 365-day system.
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1596
German astronomer Johannes Kepler (1571-1630), who had worked as an assistant to Brahe, publishes his first major work, Mysterium cosmographicum ("Mystery of the Cosmos"). He suggests that the sizes of the orbits of the planets can be explained by drawing the five convex regular solids inside each other, beginning with a sphere at the orbit of Saturn and ending with a regular octahedron between Venus and Mercury. Kepler's arguments provide more evidence for Copernicus's theory of a heliocentric solar system.
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1698
Christaan Huygens, in his posthumously published Cosmotheros, argues that planets in the solar system are inhabited, igniting a debate that extends into the 20th Century.
-www.planetary.org/explore/topics/timelines/timeline_to_1698.html
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