Kepler Publishes Astronomia Nova
1609
After years wrestling with the observations of Tycho Brahe, Johannes Kepler published a book that broke the two-thousand-year tyranny of the circle. Mars, he proved, moved in an ellipse, sweeping equal areas in equal times. Two of his three planetary laws were on the page, waiting for Newton to explain why they worked with a single elegant equation.
In context
Also in 1609 (4 other events on record)
- Galileo Builds His Telescope · Europe · Science
- Henry Hudson Enters New York Harbor · North America · Exploration
- Twelve Years' Truce · Europe · Politics
- Expulsion of the Moriscos · Europe · Religion
Before and after in Europe
Before and after in Science
Era
Renaissance (1501–1650), one of 715 events from that era on Saeculum.
Sources