tag:blogger.com,1999:blog-4407231935793705192.post3498234156197935845..comments2023-07-16T06:01:20.418-07:00Comments on Rockhoppers Daily Grind: Passing MarsRenehttp://www.blogger.com/profile/05271402898270354864noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4407231935793705192.post-8596645798096097612008-05-13T08:13:00.000-07:002008-05-13T08:13:00.000-07:00Mars' retrograde motion lead Johannes Kepler to di...Mars' retrograde motion lead Johannes Kepler to discover that all planets have elliptical,and not circular, orbits. It's a pretty interesting story, actually. <BR/><BR/>His mentor, Tycho Brahe, believed that the problem of Mars' retrograde motion was unsolvable, so he gave it to Kepler to keep him out of the way. That backfired, however, because it was exactly the information Kepler needed to prove his theory.<BR/><BR/>Cool post, Dad!Davidhttps://www.blogger.com/profile/11809111473480219028noreply@blogger.comtag:blogger.com,1999:blog-4407231935793705192.post-61127816258195023002008-05-11T22:11:00.000-07:002008-05-11T22:11:00.000-07:00Aw B.S. Mars can't travel backwards any more than....Aw B.S. Mars can't travel backwards any more than... ooh... wait... it is! How'd you do that?Anonymousnoreply@blogger.com