{"id":9141,"date":"2014-10-30T18:22:43","date_gmt":"2014-10-30T22:22:43","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=9141"},"modified":"2014-10-30T18:22:43","modified_gmt":"2014-10-30T22:22:43","slug":"planet-hunters-citizen-scientists-contribute-again-to-the-discovery-of-a-new-exoplanet","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=9141","title":{"rendered":"Planet Hunters citizen scientists contribute again to the discovery of a new exoplanet"},"content":{"rendered":"

Yale grad student Joseph R. Schmitt says that\u00a0the discovery of a new exoplanet was enabled by the work of volunteers in the Planet Hunters<\/a>\u00a0\u00a0citizens science program. Schmitt is first author on a paper about the discovery:<\/p>\n

A New Paper and New Planet Discoveries<\/a><\/strong><\/p>\n

We\u2019re happy to announce the discovery of a new planet discovered by Planet Hunters volunteers, which is now published in The Astrophysical Journal. You can read the article for free on the arXiv here<\/a>.<\/p>\n

[\u00a0[1410.8114] Planet Hunters VII. Discovery of a New Low-Mass, Low-Density Planet (PH3 c) Orbiting Kepler-289 with Mass Measurements of Two Additional Planets (PH3 b and d)<\/a>]<\/p>\n

The star (PH3\/Kepler-289\/KOI-1353\/KIC 7303287) is young and Sun-like. Two planets in the system, with periods of 35 and 126 days, had been previously validated statistically, the outer planet being a gas giant. However, Planet Hunters volunteers discovered a third transit signal between these two planets at a period of 66 days (PH3 c).<\/p>\n

A quirk in the system allowed us to actually measure the mass of all the planets using only the exact times that each planet transited. The outer two planets, PH3 c and d, do not have a constant period like most planets do. Instead, it oscillates around an average value in a regular manner, which meant that it had been missed by computer algorithms but was easy to find for human eyes. In particular, the period of PH3 c changes by 10.5 hours in just 10 orbits due to the gravitational influence of the outer gas giant tugging on the middle planet. If Earth experienced such large changes, then if 2014 were 365 days long, 2024 would be 367.4 days long, almost two and a half days longer than 2014.<\/p>\n

The new planet is about 2.7 times the radius of Earth and 4 times as massive. Its low density means that, despite its low mass, a large chunk of the planet must be composed of hydrogen and helium: 2% by mass and 50% by radius. The outer planet, on the other hand, is like a warm version of our Saturn, while the inner planet\u2019s mass is poorly known. It could be mostly rocky, watery, or gassy.<\/p>\n

We would like to thank all of the people involved in the project and all of the Planet Hunters volunteers for making this possible. We hope to find more gems like this in the future.<\/p>\n","protected":false},"excerpt":{"rendered":"

Yale grad student Joseph R. Schmitt says that\u00a0the discovery of a new exoplanet was enabled by the work of volunteers in the Planet Hunters\u00a0\u00a0citizens science program. Schmitt is first author on a paper about the discovery: A New Paper and New Planet Discoveries We\u2019re happy to announce the discovery of a new planet discovered by … Continue reading Planet Hunters citizen scientists contribute again to the discovery of a new exoplanet<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"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":""},"categories":[46,14],"tags":[],"class_list":["post-9141","post","type-post","status-publish","format-standard","hentry","category-exoplanets","category-space-participation"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-2nr","jetpack-related-posts":[{"id":5026,"url":"https:\/\/hobbyspace.com\/Blog\/?p=5026","url_meta":{"origin":9141,"position":0},"title":"Citizen scientists spot 14 exoplanet candidates – including 7th in first 7-planet system","author":"TopSpacer","date":"October 23, 2013","format":false,"excerpt":"The\u00a0Planet Hunters\u00a0citizen science project has submitted a paper to the Astronomical Journal reporting on their discovery of 14 planet candidates in the Kepler space observatory data:\u00a0Seventh heaven with our sixth exoplanet paper - Planet Hunters. See the outline here\u00a0of how the Planet Hunters project takes advantage of human pattern recognition\u2026","rel":"","context":"In "Astronomy"","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2256,"url":"https:\/\/hobbyspace.com\/Blog\/?p=2256","url_meta":{"origin":9141,"position":1},"title":"Planet Hunter citizen scientists confirmed exoplanet in star’s habitable zone","author":"TopSpacer","date":"May 12, 2013","format":false,"excerpt":"Earlier this year participants in the\u00a0Planet Hunters citizen science project confirmed with 99.9 percent confidence the discovery of a Jupiter-sized planet called PH2b orbiting within the \u201chabitable zone\u201d of its star, the range where earth-like planets could have liquid water and possibly sustain life. The researchers also announced 42 new\u2026","rel":"","context":"In "Astronomy"","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"SPH10102031","src":"https:\/\/i0.wp.com\/blogs.zooniverse.org\/planethunters\/files\/2010\/12\/SPH10102031-300x203.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":8239,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8239","url_meta":{"origin":9141,"position":2},"title":"Planet Hunters citizen science paper reports on 14 new planet candidates","author":"TopSpacer","date":"July 3, 2014","format":false,"excerpt":"Another paper based on analysis done by citizen scientist contributors to the\u00a0Planet Hunters\u00a0program has been accepted by a scientific journal:\u00a0Latest Science Paper Accepted for Publication: The First Kepler Seven Planet Candidate System and 13 Other Planet Candidates from the Kepler Archival Data -\u00a0Planet Hunters We at Planet Hunters are happy\u2026","rel":"","context":"In "Astronomy"","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8846,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8846","url_meta":{"origin":9141,"position":3},"title":"Citizens science: Planet Hunters 2.0","author":"TopSpacer","date":"September 19, 2014","format":false,"excerpt":"With the revived Kepler\u00a0space observatory once again looking\u00a0for planets orbiting other stars, the citizens science program\u00a0Planet Hunters\u00a0is graduating to Planet Hunters 2.0:\u00a0A Brand New Planet Hunters\u00a0-\u00a0Planet Hunters On December 16, 2010, the Zooniverse launched Planet Hunters to enlist the public\u2019s help to search for extrasolar planets (exoplanets) in the data\u2026","rel":"","context":"In "Exoplanets"","block_context":{"text":"Exoplanets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=46"},"img":{"alt_text":"Kepler's Second Light: How K2 Will Work","src":"https:\/\/i0.wp.com\/www.nasa.gov\/sites\/default\/files\/styles\/673xvariable_height\/public\/k2_explained_25nov_story_0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":5193,"url":"https:\/\/hobbyspace.com\/Blog\/?p=5193","url_meta":{"origin":9141,"position":4},"title":"Citizen Science: Moonometer, Moon Zoo Live, Planet Hunters and Zooniverse job ad","author":"TopSpacer","date":"November 5, 2013","format":false,"excerpt":"Some citizen science news items: The\u00a0Moonometer\u00a0at the\u00a0Moon Zoo\u00a0project gives the latest count in the number of\u00a0\u00a0LRO\u00a0images classified by participants:\u00a0The Moonometer -Moon Zoo \u00a0Check out also the\u00a0Moon Zoo Live\u00a0page to see a real-time updated display of where the latest feature to be classified is located on the Moon and the location\u2026","rel":"","context":"In "Exoplanets"","block_context":{"text":"Exoplanets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=46"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/farm8.staticflickr.com\/7325\/10671935903_b45ca16eb0_c.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":15346,"url":"https:\/\/hobbyspace.com\/Blog\/?p=15346","url_meta":{"origin":9141,"position":5},"title":"Video: Google neural network used to discover exoplanet","author":"TopSpacer","date":"December 15, 2017","format":false,"excerpt":"A NASA \/ Google collaboration used artificial intelligence (AI) techniques to discover an eighth planet around the star\u00a0Kepler-90i, which resides just over 2500 light years from earth. 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