{"id":1720,"date":"2010-01-13T13:04:09","date_gmt":"2010-01-13T12:04:09","guid":{"rendered":"http:\/\/www.rogerdarlington.me.uk\/wordpress\/?p=1720"},"modified":"2010-01-13T13:04:09","modified_gmt":"2010-01-13T12:04:09","slug":"how-do-we-measure-distance","status":"publish","type":"post","link":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/?p=1720","title":{"rendered":"How do we measure distance?"},"content":{"rendered":"<p>Over the centuries, there have been countless means of measuring distance, but today all scientists use metres. Since 1793 when the French first made the effort, there have been many attempts to define a metre.  The book &#8220;You Are Here&#8221; [my review <a href=\"http:\/\/www.rogerdarlington.me.uk\/science.html#YAH\">here<\/a>]  explains that, since 1983, the metre has been defined as the distance that light travels in a vacuum in 1\/299,792,495 of a second. So, now you know.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Over the centuries, there have been countless means of measuring distance, but today all scientists use metres. Since 1793 when the French first made the effort, there have been many attempts to define a metre. The book &#8220;You Are Here&#8221; [my review here] explains that, since 1983, the metre has been defined as the distance [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-1720","post","type-post","status-publish","format-standard","hentry","category-miscellaneous"],"_links":{"self":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/posts\/1720","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=1720"}],"version-history":[{"count":0,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=\/wp\/v2\/posts\/1720\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1720"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.rogerdarlington.me.uk\/nighthawk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}