{"id":35049,"date":"2012-04-19T17:43:47","date_gmt":"2012-04-19T17:43:47","guid":{"rendered":"http:\/\/fredbortz.peachpuff-wolverine-566518.hostingersite.com\/?p=35049"},"modified":"2012-04-20T19:32:51","modified_gmt":"2012-04-20T19:32:51","slug":"pioneer-anomaly-is-no-longer-anomalous","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/fredbortz\/35049\/pioneer-anomaly-is-no-longer-anomalous\/","title":{"rendered":"Pioneer Anomaly is no longer anomalous"},"content":{"rendered":"<p>Thanks to funding from the Planetary Society, of which I am a proud member, the &#8220;Pioneer Anomaly&#8221; has been definitively resolved. Physics has prevailed over speculation.<\/p>\n<p>Over the past 20 years, some people, including a few scientists, have looked at oddities in the trajectories of the Pioneer 10 and 11 spacecraft and proposed that our understanding of gravity was flawed. Now we have a much more mundane explanation that requires no exotic new theories.<\/p>\n<p>Due to the structure of the spacecraft, they radiate more heat in some directions than others. That produces a very small force that, when added to the gravity of known solar system bodies, leads to exactly the trajectories that have been observed.<\/p>\n<p>It took a lot of detailed sleuthing to get the necessary data, but the result is satisfying, even though it disappoints some who were hoping for a breakthrough that might lead us to resolving some perplexing issues in physics. [See the prologue and concluding sections of <A HREF=\"http:\/\/www.fredbortz.com\/Physics20thCent.htm\"><em>Physics: Decade by Decade<\/em> by Fred Bortz<\/A> (Twentieth-Century Science set, Facts on File, 2007).]<\/p>\n<p>Details at <A HREF=\"http:\/\/www.planetary.org\/blog\/article\/00003459\/\" \/>Bruce Betts&#8217; entry at the Planetary Society&#8217;s blog<\/A>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thanks to funding from the Planetary Society, of which I am a proud member, the &#8220;Pioneer Anomaly&#8221; has been definitively resolved. Physics has prevailed over speculation. Over the past 20 years, some people, including a few scientists, have looked at oddities in the trajectories of the Pioneer 10 and 11 spacecraft and proposed that our &#8230; <a title=\"Pioneer Anomaly is no longer anomalous\" class=\"read-more\" href=\"https:\/\/scienceblog.com\/fredbortz\/35049\/pioneer-anomaly-is-no-longer-anomalous\/\" aria-label=\"Read more about Pioneer Anomaly is no longer anomalous\">Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"generate_page_header":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[16,17,23,25],"tags":[],"class_list":["post-35049","post","type-post","status-publish","format-standard","hentry","category-physics","category-planetary-science","category-space-and-astronomy","category-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pioneer Anomaly is no longer anomalous - Fred Bortz<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/fredbortz\/35049\/pioneer-anomaly-is-no-longer-anomalous\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pioneer Anomaly is no longer anomalous\" \/>\n<meta property=\"og:description\" content=\"Thanks to funding from the Planetary Society, of which I am a proud member, the &#8220;Pioneer Anomaly&#8221; has been definitively resolved. Physics has prevailed over speculation. Over the past 20 years, some people, including a few scientists, have looked at oddities in the trajectories of the Pioneer 10 and 11 spacecraft and proposed that our ... 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