Answer :

xoxosiri91
kepler discovered that the orbit of mars was an ellipse

not sure if this is what you want but hope this helps!!
rowan92
Using the precise data that Tycho had collected, Kepler discovered that the orbit of Mars was an ellipse. In 1609 he published Astronomia Nova, delineating his discoveries, which are now called Kepler's first two laws of planetary motion.
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