{"id":4445,"date":"2011-07-12T03:58:00","date_gmt":"2011-07-12T03:58:00","guid":{"rendered":"https:\/\/www.eastrovedica.com\/wordpress\/?p=4445"},"modified":"2011-07-12T03:58:00","modified_gmt":"2011-07-12T03:58:00","slug":"the-epicyclic-theory-of-indian-astronomy-2","status":"publish","type":"post","link":"https:\/\/www.eastrovedica.com\/wordpress\/?p=4445","title":{"rendered":"The Epicyclic Theory of Indian Astronomy"},"content":{"rendered":"<p><a href=\"http:\/\/1.bp.blogspot.com\/-Vng2AxxntSU\/ThvESTFqJII\/AAAAAAAABno\/BTXEyP6CbNE\/s1600\/epicyclic.jpg\"><img decoding=\"async\" style=\"display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 400px; height: 400px;\" src=\"http:\/\/1.bp.blogspot.com\/-Vng2AxxntSU\/ThvESTFqJII\/AAAAAAAABno\/BTXEyP6CbNE\/s320\/epicyclic.jpg\" border=\"0\" alt=\"\"id=\"BLOGGER_PHOTO_ID_5628307977970263170\" \/><\/a><\/p>\n<p>All planets traverse in ellipses and epicycles and this came to be known as the Epicycles Theory.<\/p>\n<p>In the above diagram, the circle A is the mean orbit of the planet. P is the mean Position of the planet and the small circle P is the epicycle. <\/p>\n<p>The small epicycles traversed by a planet are calculated and the <span style=\"font-style:italic;\">mandaphala<\/span>, the equation of center is computed and added if the <span style=\"font-style:italic;\">Manda Kendra<\/span> is in between 180 and 360 and subtracted if the M K is < 180. <span style=\"font-style:italic;\">Manda Kendra<\/span> is the angle between Position and Aphelion. <\/p>\n<p>From the perspective of the Epicyclic theory &#038;  the Hindu astronomers, the radius of the epicycle was given instead of PQ and the circumferences of the epicycles. Both circumferences and radii are given in degrees, minutes and seconds, so that the equation of the center may be computed in deg min and secs. The epicycle in the case of the Equation of Center is given as <span style=\"font-style:italic;\">Manda Nicha Uccha Vritta. <br \/><\/span><\/p>\n<p>Manda &#8211; Manda Phala or Equation of Center<br \/>Uccha &#8211; Apogee<br \/>Nicha &#8211; Perigee<\/p>\n<p><span style=\"font-style:italic;\">Manda Kriya is a Jya Ganitha Kriya<\/span>, a trignometric reduction of the mean longitudes and distances of the planets to their heliocentric longitudes and distances.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>All planets traverse in ellipses and epicycles and this came to be known as the Epicycles Theory. In the above diagram, the circle A is the mean orbit of the planet. P is the mean Position of the planet and the small circle P is the epicycle. The small epicycles traversed by a planet are &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.eastrovedica.com\/wordpress\/?p=4445\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;The Epicyclic Theory of Indian Astronomy&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4445","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4445"}],"version-history":[{"count":0,"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4445\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4445"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4445"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eastrovedica.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}