Oleg Zabluda's blog
Monday, January 22, 2018
 
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The K2 campaign 12 data was collected by Kepler from 15 December 2016 to 4 March 2017 and uploaded to Zooniverse in April 2017. Within days, crowdsource efforts identified star K2-138 as a promising candidate for a planetary system with four transit signatures found in the initial crowdsource data review.
[...]
the discovery of the multi-planet system by Zooniverse crowdsourcing on was not officially confirmed until last week when NASA announced that a study on the data identified by citizen scientist had been analyzed and accepted for publication in The Astronomical Journal.

Follow-up observations from Earth-based telescopes were arranged for the system and not only confirmed the four exoplanets but also found a fifth.

A potential sixth planet in the K2-138 system was also flagged for further study. Kepler data was found to contain two potential transits for this sixth planet, but three transits are required for confirmation.
[...]
As of 1 January 2018, there are 3,726 confirmed planets in 2,792 systems, with 622 systems having more than one planet. [...] 4,496 exoplanet candidates currently awaiting confirmation.
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https://www.nasaspaceflight.com/2018/01/k2-138-system-first-exoplanet-system-discovered-citizen-scientists/


https://www.nasaspaceflight.com/2018/01/k2-138-system-first-exoplanet-system-discovered-citizen-scientists/

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