{"id":124528,"date":"2019-06-25T18:40:15","date_gmt":"2019-06-25T18:40:15","guid":{"rendered":"https:\/\/www.bnreport.com\/a-new-algorithm-finds-nearby-stars-that-could-host-hidden-worlds\/"},"modified":"2019-06-25T18:40:15","modified_gmt":"2019-06-25T18:40:15","slug":"a-new-algorithm-finds-nearby-stars-that-could-host-hidden-worlds","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/a-new-algorithm-finds-nearby-stars-that-could-host-hidden-worlds\/","title":{"rendered":"A new algorithm finds nearby stars that could host hidden worlds"},"content":{"rendered":"<p>A new planet-hunting algorithm suggests that at least <a href=\"https:\/\/agu.confex.com\/agu\/abscicon19\/meetingapp.cgi\/Paper\/481947\" rel=\"noreferrer noopener\" target=\"_blank\">9 percent of nearby stars could host planets<\/a> orbiting out of sight \u2014 and the stars chemistry could help find the worlds.<\/p>\n<p>Planetary astrophysicist Natalie Hinkel of the Southwest Research Institute in San Antonio and colleagues trained a <a href=\"https:\/\/www.sciencenews.org\/article\/ai-learns-playing-video-games-starcraft-minecraft\" rel=\"noreferrer noopener\" target=\"_blank\">machine-learning algorithm<\/a> on a catalog of thousands of stars and their chemical compositions (<em>SN: 5\/11\/19, p. 34<\/em>). In the dataset of stars located within about 500 light-years of the sun, 290 were known to host giant planets, while more than 4,200 didnt \u2014 or so astronomers thought.<\/p>\n<p>First, the algorithm analyzed the chemistry of the planet-hosting stars. Then, based on what it learned about those celestial objects, the program estimated the probability that each of the stars in the other group actually does host planets.<\/p>\n<p>It works similarly to how online TV streaming companies like Netflix choose which TV shows to recommend to viewers, Hinkel says. \u201cIf I watch a bunch of movies, Netflix learns that I like science fiction, martial arts movies and British period movies,\u201d she says. The program then uses that knowledge to identify other shows she might like \u2014 that is, the stars with planets not yet detected.<\/p>\n<p>The new algorithm identified 368 additional stars \u2014 or about 9 percent of the stars thought to be lacking planets \u2014 that had a more than 90 percent probability of hosting a giant exoplanet, Hinkel reports June 26 in Seattle at the Astrobiology Science Conference. \u201cThat was way more than I was expecting,\u201d she say<a href=\"https:\/\/www.sciencenews.org\/article\/new-algorithm-finds-nearby-stars-could-host-exoplanets\" rel=\"noreferrer noopener\" target=\"_blank\"><strong>Read More \u2013 Source<\/strong><\/a><br \/>\n[contf]<br \/>\n[contfnew]<br \/>\n        <img decoding=\"async\" src=\"https:\/\/www.sciencenews.org\/profiles\/sn\/themes\/science_news\/logo.png\"\/><\/p>\n<h5><a href=\"https:\/\/app.newswirenow.co.uk\/www.sciencenews.org\" rel=\"noreferrer noopener\" target=\"_blank\">science news<\/a><\/h5>\n<p>[contfnewc]<br \/>\n[contfnewc]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new planet-hunting algorithm suggests that at least 9 percent of nearby stars could host planets o..<\/p>\n","protected":false},"author":1,"featured_media":124529,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-124528","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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