{"id":1928,"date":"2015-01-05T07:38:14","date_gmt":"2015-01-05T07:38:14","guid":{"rendered":"http:\/\/revoscience.com\/en\/?p=1928"},"modified":"2015-01-05T07:38:14","modified_gmt":"2015-01-05T07:38:14","slug":"solar-dynamics-observatory","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/solar-dynamics-observatory\/","title":{"rendered":"Solar Dynamics Observatory"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><a href=\"http:\/\/revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-1929\" src=\"http:\/\/revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193-300x300.jpg\" alt=\"20150101_001043_1024_0193\" width=\"300\" height=\"300\" title=\"\" srcset=\"https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193-300x300.jpg 300w, https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193-150x150.jpg 150w, https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg 946w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>There were no such new fireworks on the sun was observed to welcome in the New Year, only a few \u00a0flares during the last day of 2014 were observed. Instead, the sun starts 2015 with an enormous coronal hole near the south pole. This image,\u00a0<a style=\"color: #273da2 !important;\" href=\"http:\/\/sdoisgo.blogspot.com\/2015\/01\/a-big-sdo-welcome-to-2015.html\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #000000;\">captured on Jan. 1, 2015<\/span><\/a>\u00a0by the Atmospheric Imaging Assembly (AIA) instrument on NASA&#8217;s Solar Dynamics Observatory, shows the coronal hole as a dark region in the south.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Coronal holes are regions of the corona where the magnetic field reaches out into space rather than looping back down onto the surface. Particles moving along those magnetic fields can leave the sun rather than being trapped near the surface. Those trapped particles can heat up and glow, giving us the lovely AIA images. In the parts of the corona where the particles leave the sun, the glow is much dimmer and the coronal hole looks dark.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Coronal holes were first seen in images taken by astronauts on board\u00a0<a style=\"color: #273da2 !important;\" href=\"http:\/\/solarscience.msfc.nasa.gov\/Skylab.shtml\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #000000;\">NASA\u2019s Skylab space station in 1973 and 1974<\/span><\/a>. They can be seen for a long time, although the exact shape changes all the time. The polar coronal hole can remain visible for five years or longer. Each time a coronal hole rotates by the Earth we can measure the particles flowing out of the hole as a high-speed stream, another source of space weather.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Charged particles in the Earth\u2019s radiation belts are accelerated when the high-speed stream runs into the Earth\u2019s magnetosphere. The acceleration of particles in the magnetosphere is studied by\u00a0NASA\u2019s\u00a0<a style=\"color: #273da2 !important;\" href=\"http:\/\/www.nasa.gov\/mission_pages\/rbsp\/mission\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #000000;\">Van Allen Probes<\/span><\/a>\u00a0mission.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">As Solar Cycle 24 fades, the number of flares each day will get smaller, but the coronal holes provide another source of space weather that needs to be understood and predicted.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>There were no such new fireworks on the sun was observed to welcome in the New Year, only a few \u00a0flares during the last day of 2014 were observed. Instead, the sun starts 2015 with an enormous coronal hole near the south pole. This image,\u00a0captured on Jan. 1, 2015\u00a0by the Atmospheric Imaging Assembly (AIA) instrument [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":1929,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1928","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space-news"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",946,946,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193-150x150.jpg",150,150,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193-300x300.jpg",300,300,true],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",750,750,false],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",750,750,false],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",946,946,false],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",946,946,false],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",800,800,false],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",570,570,false],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",600,600,false],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",600,600,false],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",490,490,false],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",360,360,false],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",65,65,false],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",640,640,false],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",96,96,false],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2015\/01\/20150101_001043_1024_0193.jpg",150,150,false]},"author_info":{"info":["Amrita Tuladhar"]},"category_info":"<a href=\"https:\/\/www.revoscience.com\/en\/category\/news\/space-news\/\" rel=\"category tag\">Space\/ AstroPhysics<\/a>","tag_info":"Space\/ AstroPhysics","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/1928","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=1928"}],"version-history":[{"count":0,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/1928\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/1929"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=1928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=1928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=1928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}