{"id":27850,"date":"2017-08-31T09:13:50","date_gmt":"2017-08-31T13:13:50","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=27850"},"modified":"2017-08-31T09:13:50","modified_gmt":"2017-08-31T13:13:50","slug":"image-shows-the-extent-of-human-radio-broadcasts","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/08\/image-shows-the-extent-of-human-radio-broadcasts\/","title":{"rendered":"Image shows the extent of human radio broadcasts"},"content":{"rendered":"
\"\"<\/a>

Click to enlarge (Image credit: Adam Grossman of\u00a0The Dark Sky Company)<\/p><\/div>\n

(Source: Popular Mechanics<\/a>)<\/p>\n

Carl Sagan’s famous line from his 1990 speech about the\u00a0Pale Blue Dot<\/a>\u00a0image\u2014”Our planet is a lonely speck in the great enveloping cosmic dark”\u2014is an understatement. We might consider our Milky Way, with its estimated 100 to 400 billion stars, a significant fixture in the cosmos. But there are some 100 billion galaxies just like it in the observable universe. It’s a daunting reality to consider when we’re thinking about the possibility of making contact with any intelligence that might be out there.<\/p>\n

This map designed by Adam Grossman of\u00a0The Dark Sky Company<\/a>\u00a0puts into perspective the enormity of these scales. The Milky Way stretches between 100,000 and 180,000 light-years across, depending on where you measure, which means a signal broadcast from one side of the galaxy would take 100,000 years or more to reach the other side. Now consider that our species started broadcasting radio signals into space only about a century ago. That’s represented by a small blue bubble measuring 200 light-years in diameter surrounding the position of the Earth. For any alien civilizations to have heard us, they must be within the bubble.[…]<\/p><\/blockquote>\n

Continue reading at Popular Mechanics online…<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

(Source: Popular Mechanics) Carl Sagan’s famous line from his 1990 speech about the\u00a0Pale Blue Dot\u00a0image\u2014”Our planet is a lonely speck in the great enveloping cosmic dark”\u2014is an understatement. We might consider our Milky Way, with its estimated 100 to 400 billion stars, a significant fixture in the cosmos. But there are some 100 billion galaxies […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3],"tags":[6472,4579,6471,6473,581],"class_list":["post-27850","post","type-post","status-publish","format-standard","hentry","category-news","tag-adam-grossman","tag-astronomy","tag-dark-sky-company","tag-popular-mechanics","tag-radio-astronomy"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-7fc","jetpack-related-posts":[{"id":31663,"url":"https:\/\/swling.com\/blog\/2018\/04\/admx-a-dark-matter-receiver\/","url_meta":{"origin":27850,"position":0},"title":"ADMX: A Dark Matter receiver","author":"Thomas","date":"April 16, 2018","format":false,"excerpt":"(Source: Futurity) Radio receiver \u2018listens\u2019 for dark matter particles Researchers have developed a way to \u201clisten\u201d for the signs of dark matter axions, the particles that may make up dark matter. Forty years ago, scientists theorized a new kind of low-mass particle that could solve one of the enduring mysteries\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Galaxy_pie_chart_Print-1024x576.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Galaxy_pie_chart_Print-1024x576.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Galaxy_pie_chart_Print-1024x576.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":31158,"url":"https:\/\/swling.com\/blog\/2018\/03\/78-megahertz-australian-astronomers-detect-signal-from-the-dawn-of-the-universe\/","url_meta":{"origin":27850,"position":1},"title":"78 Megahertz: Australian astronomers detect signal from the dawn of the universe","author":"Thomas","date":"March 12, 2018","format":false,"excerpt":"(Source: ABC Science\u00a0via William Lee) Astronomers detect signal from the dawn of the universe, using simple antenna in WA outback They have picked up a radio signature produced just 180 million years after the Big Bang using a simple antenna in the West Australian outback. The ground breaking discovery, reported\u2026","rel":"","context":"In "FM"","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/Hubble-Space-Telescope-Cosmos-Universe-Galaxies-Stars-1024x646.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/Hubble-Space-Telescope-Cosmos-Universe-Galaxies-Stars-1024x646.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/Hubble-Space-Telescope-Cosmos-Universe-Galaxies-Stars-1024x646.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":20287,"url":"https:\/\/swling.com\/blog\/2016\/08\/radio-sky-spectrograph-radio-astonomy-with-the-sdrplay-rsp\/","url_meta":{"origin":27850,"position":2},"title":"Radio-Sky Spectrograph: Radio Astonomy with the SDRplay RSP","author":"Thomas","date":"August 2, 2016","format":false,"excerpt":"(Source: Amateur Radio Astronomy blog) Thanks to the efforts of Nathan Towne, we now have the ability to use [the SDRplay RSP] with\u00a0Radio-Sky Spectrograph (RSS). [...]As with RTL Bridge, a intermediary program sits between RSS and the receiver. \u00a0This program was written by Nathan Towne and is named SDRPlay2RSS, not\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"The SDRplay RSP software defined radio","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/SDRPlay-RSP-1.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/SDRPlay-RSP-1.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/SDRPlay-RSP-1.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":34600,"url":"https:\/\/swling.com\/blog\/2018\/10\/scott-tilley-ve7til-the-amateur-astronomer-who-found-a-lost-nasa-satellite\/","url_meta":{"origin":27850,"position":3},"title":"Scott Tilley (VE7TIL): The Amateur Astronomer Who Found a Lost NASA Satellite","author":"Thomas","date":"October 23, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Cap Tux, who shared a link to the following video on YouTube. This short video is brilliant and will be the reference I use when people ask about the intersection of radio and amateur astronomy: https:\/\/youtu.be\/hMsE1rxeOw4 Click here to view on YouTube. Amateur astronomer\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Tilley-Satellite.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Tilley-Satellite.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Tilley-Satellite.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Tilley-Satellite.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30125,"url":"https:\/\/swling.com\/blog\/2018\/01\/thomas-explores-the-depths-of-radio-astronomy\/","url_meta":{"origin":27850,"position":4},"title":"Tom explores the depths of radio astronomy","author":"Thomas","date":"January 11, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Tom L, who writes: I have been curiously surveying uses of radio in different areas of industry and Astronomy came up as a hot topic the last couple of years according to recent Google searches. Radio was a giant popular commercial success in the\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/10\/PARI-East-26M-Antenna-4-768x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/10\/PARI-East-26M-Antenna-4-768x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/10\/PARI-East-26M-Antenna-4-768x1024.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":27357,"url":"https:\/\/swling.com\/blog\/2017\/07\/the-itty-bitty-radio-telescope-kit\/","url_meta":{"origin":27850,"position":5},"title":"The Itty Bitty Radio Telescope Kit","author":"Thomas","date":"July 28, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor, Troy Riedel, who writes: You know my amateur astronomy background. And With the building interest in next month's Solar Eclipse - and your recent posting from Sky&Telescope re: \"How to watch the solar eclipse with your AM radio\" - I thought this might be\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Itty-Bitty-Radio-Telescope.jpeg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Itty-Bitty-Radio-Telescope.jpeg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Itty-Bitty-Radio-Telescope.jpeg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/27850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=27850"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/27850\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=27850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=27850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=27850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}