{"id":1691,"date":"2009-12-23T08:00:45","date_gmt":"2009-12-23T07:00:45","guid":{"rendered":"http:\/\/www.rogerdarlington.me.uk\/wordpress\/?p=1691"},"modified":"2009-12-23T08:00:45","modified_gmt":"2009-12-23T07:00:45","slug":"what-is-gravity","status":"publish","type":"post","link":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/?p=1691","title":{"rendered":"What is gravity?"},"content":{"rendered":"<p>I&#8217;m reading a fascinating book of cosmology called <a href=\"http:\/\/www.amazon.co.uk\/You-are-Here-Portable-Universe\/dp\/0091796881\/ref=sr_1_1?ie=UTF8&#038;s=books&#038;qid=1261168622&#038;sr=1-1\">&#8220;You Are Here&#8221;<\/a> and written by Christopher Potter. It raises some challenging topics.<br \/>\nFor example, what is gravity?<br \/>\nPotter quotes John Wheeler as explaining: &#8220;Matter tells space how to curve and space tells matter how to move&#8221;. But he also quotes Michio Kaku as arguing: &#8220;In some sense, gravity does not exist; what moves the planets and the stars is the distortion of space and time&#8221;.<br \/>\nA <a href=\"http:\/\/en.wikipedia.org\/wiki\/Gravity\">discussion of gravity on Wikipedia<\/a> states: &#8220;Modern physics describes gravitation using the general theory of relativity, in which gravitation is a consequence of the curvature of spacetime which governs the motion of inertial objects.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;m reading a fascinating book of cosmology called &#8220;You Are Here&#8221; and written by Christopher Potter. It raises some challenging topics. For example, what is gravity? Potter quotes John Wheeler as explaining: &#8220;Matter tells space how to curve and space tells matter how to move&#8221;. But he also quotes Michio Kaku as arguing: &#8220;In some [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1691","post","type-post","status-publish","format-standard","hentry","category-science-technology"],"_links":{"self":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/posts\/1691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1691"}],"version-history":[{"count":0,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/posts\/1691\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1691"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}