# Kepler papers (2-body problem) [closed]

Where can I find papers by Kepler? I am looking for his solution to the two-body problem.

## closed as off-topic by Michael Seifert, Qmechanic♦Apr 18 at 8:57

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• This question is more about the history of physics than about physics itself, and is probably better suited to History of Science and Mathematics. – Michael Seifert Apr 18 at 1:22
• It's also worth noting that Kepler's entire life pre-dates what is usually thought of as the first purely scientific journal, Philosophical Transactions of the Royal Society. So asking for "papers by Kepler" may be something of an anachronism. – Michael Seifert Apr 18 at 1:26
• You can find Kepler's books. But what two-body problem solution are you talking about? Newtonian mechanics was not invented either during Kepler's life. – nasu Apr 18 at 3:28

Kepler did not have a formal solution to the two body problem. The problem itself was not even defined until Newton's work on gravity developed a theoretical framework for it. All that $$F = \frac {GM_1M_2}{r^2}$$ stuff that Newton developed did not exist for Kepler.