I have redirected your page Kepler's 3 laws of planetary motion to the existing page Kepler's laws of planetary motion, and fixed any resulting double redirects.  In the future, before creating an article, try to determine whether Wikipedia already has an article on that topic, by searching for possible alternate titles, and checking pages which are likely to link to the article in question.  If the article exists, but you feel users might reasonably be looking for it under a different name, then create a redirect page, by creating a new page with only the text #REDIRECT [[target page]], and the applicable redirect template from Wikipedia:Template messages/Redirect pages. Thanks, and happy editing! —  contribs