{"id":3789,"date":"2022-02-13T17:25:24","date_gmt":"2022-02-13T17:25:24","guid":{"rendered":"http:\/\/abergavennyas.org.uk\/?p=3789"},"modified":"2022-02-13T17:25:26","modified_gmt":"2022-02-13T17:25:26","slug":"james-webb-telescope-13-feb","status":"publish","type":"post","link":"http:\/\/abergavennyas.org.uk\/?p=3789","title":{"rendered":"James Webb Telescope (13 Feb)"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-full\"><a href=\"http:\/\/abergavennyas.org.uk\/wp-content\/uploads\/2022\/02\/JWST-orbit.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"298\" height=\"460\" src=\"http:\/\/abergavennyas.org.uk\/wp-content\/uploads\/2022\/02\/JWST-orbit.jpg\" alt=\"\" class=\"wp-image-3788\" srcset=\"http:\/\/abergavennyas.org.uk\/wp-content\/uploads\/2022\/02\/JWST-orbit.jpg 298w, http:\/\/abergavennyas.org.uk\/wp-content\/uploads\/2022\/02\/JWST-orbit-194x300.jpg 194w, http:\/\/abergavennyas.org.uk\/wp-content\/uploads\/2022\/02\/JWST-orbit-136x210.jpg 136w\" sizes=\"auto, (max-width: 298px) 100vw, 298px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>Bob Wright (Usk) gave an interesting talk on the JWST back in January.\u00a0 In case you wanted a little more on the current situation I came across a video on the \u201cLaunch Pad Astronomy\u201d channel on YouTube.<\/p>\n\n\n\n<p>It\u2019s entitled \u201cHow James Webb orbits nothing\u201d.\u00a0 It goes into the theory behind how the JWST can orbit an empty spot in space \u2013 just in case you ever wondered.\u00a0 It also emphasises the task that is faced by the JW team and the number of variables that they have to take into account.<br>A couple of interesting points from the video are that the telescope elliptical orbit around L2 takes about 6 months and, it\u2019s up to twice the size of the moon\u2019s orbit around Earth (JW orbit 250,000 to 832,000 cf the Moon 360,000 to 400,000km).\u00a0 The other point was that it isn\u2019t actually orbiting L2 but a point slightly on the Earth side of L2.\u00a0 Reasons are in the video.<br>You can access it at this \u00a0<a href=\"https:\/\/www.youtube.com\/watch?v=ybn8-_QV8Tg\">LINK<\/a> .<\/p>\n\n\n\n<p>Also, the \u201cWhere is Webb\u201d website, <a href=\"https:\/\/jwst.nasa.gov\/content\/webbLaunch\/whereIsWebb.html\">HERE<\/a>, explains how the first photons have been received of star (HD84406, some 260 l.yrs distant in Ursa Major) although, as the mirrors are not yet aligned, the picture isn\u2019t much to look at.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bob Wright (Usk) gave an interesting talk on the JWST back in January.\u00a0 In case you wanted a little more on the current situation I came across a video on the \u201cLaunch Pad Astronomy\u201d channel on YouTube. It\u2019s entitled \u201cHow James Webb orbits nothing\u201d.\u00a0 It goes into the theory behind how the JWST can orbit [&hellip;]<\/p>\n","protected":false},"author":46,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_s2mail":"yes","ngg_post_thumbnail":0,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-3789","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/3789","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/users\/46"}],"replies":[{"embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3789"}],"version-history":[{"count":1,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/3789\/revisions"}],"predecessor-version":[{"id":3792,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/3789\/revisions\/3792"}],"wp:attachment":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3789"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3789"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}