NASAのインスタグラム(nasa) - 1月13日 02時27分

🤯 Discovery alert: We don’t know of many planets quite like this!Thanks to data from our @NASA TESS mission, a planet existing around THREE stars has been confirmed, after a hefty hunt that spanned about 11 years! It all started shortly after NASA's Kepler mission began operations in 2009, when it identified what was thought to be a planet about the size of Neptune later known as KOI-5Ab. The planet which was the second new planet candidate to be found by the mission, was ultimately forgotten as Kepler racked up planet discoveries. Now, the chief scientist of NASA’s Exoplanet Science Institute says he has “resurrected KOI-5Ab from the dead!" and we are so glad he did. Planet KOI-5Ab (shown here transiting across the face of a sun-like star), is located 1,800 light-years away in the Cygnus constellation. It is about one half the mass of Saturn & orbits a star (star A) with a relatively close companion (star B). Star A and star B orbit each other every 30 years. A third gravitationally bound star (star C) orbits stars A and B every 400 years.Illustration Credits: Caltech/R. Hurt (Infrared Processing and Analysis Center, or IPAC)#NASA #Galaxy #Universe #NewWorld #TripleStarSystem #NewDiscovery #LookUp #Space

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