{"id":5026,"date":"2013-10-23T20:27:56","date_gmt":"2013-10-23T20:27:56","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=5026"},"modified":"2013-10-23T20:27:56","modified_gmt":"2013-10-23T20:27:56","slug":"citizen-scientists-spot-14-exoplanet-candidates-including-7th-in-first-7-planet-system","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=5026","title":{"rendered":"Citizen scientists spot 14 exoplanet candidates – including 7th in first 7-planet system"},"content":{"rendered":"

The\u00a0Planet Hunters<\/a>\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<\/a>.<\/p>\n

See the outline here<\/a>\u00a0of how the Planet Hunters project takes advantage of human pattern recognition abilities to spot the changes in brightness of a star as a planet crosses in front of it.<\/p>\n

In the Planet Hunters blog<\/a>:<\/p>\n

The most exciting result involves KOI-351, a system with six known planet candidates identified by the Kepler team, two of which had also been independently discovered by Planet Hunters before the Kepler identification.\u00a0 We have identified a\u00a0seventh<\/strong>\u00a0candidate, marking KOI-351 as the first Kepler seven planet system.\u00a0 While we cannot yet confirm the candidates in KOI-351, gravitational interactions between the planet candidates overwhelmingly point to their planetary nature.\u00a0 It is also known that false positives in multiple candidate systems are extremely rare.<\/p>\n

All of this together makes KOI-351 the strongest case for the first seven planet system known (apart from our own Solar System, of course!) The new planet is the fifth furthest from its parent star, orbiting with a period of nearly 125 days. With a radius of 2.8 times that of the Earth (+\/- 1.1) it fits snugly into a family that now includes two roughly Earth sized worlds, three \u2018super-Earths\u2019 and two larger bodies.<\/p>\n

In total, we announce the discovery of 14 planet candidates, all of which were identified by volunteers through the Planet Hunters Talk page.\u00a0 Of these, eight reside in their host star\u2019s habitable zone, but none of them approach Earth or super-Earth size.\u00a0 Additionally, five of these new candidates met the requirements to have been detected by the Kepler team\u2019s automated Transit Planet Search algorithm, but were undetected, including KOI-351.07, the newly discovered seventh candidate.<\/p><\/blockquote>\n

Here is the paper that they have submitted and its abstract:\u00a0Planet Hunters VI: The First Kepler Seven Planet Candidate System and 13 Other Planet Candidates from the Kepler Archival Data – J.A. Schmitt et al<\/a><\/p>\n

We report the discovery of 14 new transiting planet candidates in the Kepler field from the Planet Hunters citizen science program. None of these candidates overlap with Kepler Objects of Interest (KOIs), and five of the candidates were missed by the Kepler Transit Planet Search (TPS) algorithm. The new candidates have periods ranging from 124-904 days, eight residing in their host star’s habitable zone (HZ) and two (now) in multiple planet systems. We report the discovery of one more addition to the six planet candidate system around KOI-351, marking the first seven planet candidate system from Kepler. Additionally, KOI-351 bears some resemblance to our own solar system, with the inner five planets ranging from Earth to mini-Neptune radii and the outer planets being gas giants; however, this system is very compact, with all seven planet candidates orbiting\u00a0\u22721\u00a0AU from their host star. We perform a numerical integration of the orbits and show that the system remains stable for over 100 million years. A Hill stability test also confirms the feasibility for the dynamical stability of the KOI-351 system.<\/p><\/blockquote>\n

The paper will need to pass the peer review process before it can be published. There may be changes suggested by the reviewers as well. If accepted, this will be the sixth paper from Planet Hunters to be published.<\/p>\n","protected":false},"excerpt":{"rendered":"

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 abilities to spot the changes … Continue reading Citizen scientists spot 14 exoplanet candidates – including 7th in first 7-planet system<\/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":[12,46,14],"tags":[],"class_list":["post-5026","post","type-post","status-publish","format-standard","hentry","category-astronomy","category-exoplanets","category-space-participation"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-1j4","jetpack-related-posts":[{"id":8239,"url":"https:\/\/hobbyspace.com\/Blog\/?p=8239","url_meta":{"origin":5026,"position":0},"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":5026,"position":1},"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":2256,"url":"https:\/\/hobbyspace.com\/Blog\/?p=2256","url_meta":{"origin":5026,"position":2},"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":9141,"url":"https:\/\/hobbyspace.com\/Blog\/?p=9141","url_meta":{"origin":5026,"position":3},"title":"Planet Hunters citizen scientists contribute again to the discovery of a new exoplanet","author":"TopSpacer","date":"October 30, 2014","format":false,"excerpt":"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\u2026","rel":"","context":"In "Exoplanets"","block_context":{"text":"Exoplanets","link":"https:\/\/hobbyspace.com\/Blog\/?cat=46"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":5193,"url":"https:\/\/hobbyspace.com\/Blog\/?p=5193","url_meta":{"origin":5026,"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":7989,"url":"https:\/\/hobbyspace.com\/Blog\/?p=7989","url_meta":{"origin":5026,"position":5},"title":"Citizen science: The Milky Way Project classifies 1M images + New Kepler data for Planet Hunters","author":"TopSpacer","date":"May 31, 2014","format":false,"excerpt":"The Milky Way Project\u00a0at the Zooniverse citizen science site has accomplished a lot in a short time:\u00a01,000,000 Classifications and 7 Languages - The Milky Way Project The Milky Way Project has now passed one million classifications since its relaunch a few months ago. 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