{"id":243635,"date":"2016-11-17T15:00:00","date_gmt":"2016-11-17T19:00:00","guid":{"rendered":"http:\/\/spaceweekly.com\/?guid=9da9d0e569537be86a16d9d700c2d496"},"modified":"2016-11-17T15:00:00","modified_gmt":"2016-11-17T19:00:00","slug":"a-day-at-the-comet","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=243635","title":{"rendered":"A day at the comet"},"content":{"rendered":"<p>\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/videos\/2016\/11\/a_day_at_the_comet\/16506905-1-eng-GB\/A_day_at_the_comet_small.jpg\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\" \/><\/p>\n<p>\nSequence of 23&nbsp;images of Comet 67P\/Churyumov\u2013Gerasimenko taken with Rosetta&#8217;s&nbsp;OSIRIS narrow-angle camera on 4 July 2015, about a&nbsp;month before the&nbsp;comet\u2019s closest approach to the Sun. The three-colour images are&nbsp;made from observations at 480, 649 and 882 nm.\n<\/p>\n<p>The images are taken&nbsp;at 30 minute intervals and span a full day at the comet, which spins&nbsp;around its axis in about 12.4 hours. The Sun is towards&nbsp;the top of&nbsp;the frame.<br \/>The sequence reveals daily&nbsp;colour variations on the surface, with bluer portions of the surface&nbsp;being richer in water ice than their redder&nbsp;surroundings.\n<\/p>\n<p>\nA daily cycle of water ice&nbsp;occurs at the comet: quickly turning into water vapour when exposed&nbsp;to sunlight during the local daytime, it condenses&nbsp;back into thin&nbsp;layers of frost and ice as the temperature decreases after sunset,&nbsp;only to sublimate again on the following day.\n<\/p>\n<p>\nFor more information&nbsp;see:&nbsp;<a href=\"http:\/\/www.esa.int\/www.esa.int\/Our_Activities\/Space_Science\/Rosetta\/Icy_surprises_at_Rosetta_s_comet\"><i>Icy surprises at Rosetta&#8217;s comet<\/i><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/videos\/2016\/11\/a_day_at_the_comet\/16506905-1-eng-GB\/A_day_at_the_comet_small.jpg\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\"><\/p>\n<p>\nSequence of 23&nbsp;images of Comet 67P\/Churyumov&ndash;Gerasimenko taken with Rosetta&#8217;s&nbsp;OSIRIS narrow-angle camera on 4 July 2015, about a&nbsp;month before the&nbsp;comet&rsquo;s closest approach to the Sun. The three-colour images are&nbsp;made from observations at 480, 649 and 882 nm.\n<\/p>\n<p>The images are taken&nbsp;at 30 minute intervals and span a full day at the comet, which spins&nbsp;around its axis in about 12.4 hours. The Sun is towards&nbsp;the top of&nbsp;the frame.<br \/>The sequence reveals daily&nbsp;colour variations on the surface, with bluer portions of the surface&nbsp;being richer in water ice than their redder&nbsp;surroundings.\n<\/p>\n<p>\nA daily cycle of water ice&nbsp;occurs at the comet: quickly turning into water vapour when exposed&nbsp;to sunlight during the local daytime, it condenses&nbsp;back into thin&nbsp;layers of frost and ice as the temperature decreases after sunset,&nbsp;only to sublimate again on the following day.\n<\/p>\n<p>\nFor more information&nbsp;see:&nbsp;<a href=\"http:\/\/www.esa.int\/www.esa.int\/Our_Activities\/Space_Science\/Rosetta\/Icy_surprises_at_Rosetta_s_comet\"><i>Icy surprises at Rosetta&#8217;s comet<\/i><\/a><\/p>\n","protected":false},"author":5,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-243635","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-multimedia"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=243635"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243635\/revisions"}],"predecessor-version":[{"id":243636,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243635\/revisions\/243636"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=243635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=243635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=243635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}