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July 16, 2020
Add simpler explanation
+20
→Mathematics: typo
m+1
Nicer date format in references
m+12
→Mathematics: Add bit on eccentricity
+441
April 13, 2019
September 24, 2016
July 18, 2016
July 13, 2016
January 16, 2009
April 22, 2007
April 10, 2007
April 6, 2007
move sentence about comets et al. to Orbit
-173
planets revolving the sun always follow elliptical orbits
m+6
eccentric orbits
m+4
April 4, 2007
no edit summary
+49
no edit summary
+22
sp: Ptolemaic
m+1
no edit summary
m-1
Kepler didn't have much to do with Galileo
-24
Kepler proved that planets orbiting the sun always follow elliptical paths
m+4
important in astronomy
m+12
he sound waves bounce off the walls and combine again at the other focal point
+91
sp: there
mEverything I know about an ellipse without using analytic geometry.
+1,284