Kepler-90 (= KIC 11442793 = KOI-351) is the first extrasolar system known to be made of eight planets around a star, as the Solar System.
The central star is a yellow dwarf star (G0V spectral type) with a radius and a mass respectively about 12% and 29% larger than those of the Sun.
All eight planets were discovered thanks to the observation of their transits by the Kepler space telescope, in 2013 for planets Kepler-90 b to h and in 2017 for Kepler-90 i. The three innermost planets (Kepler-90 b, c and i) are very hot (super-)Earths, the three intermediate planets (Kepler-90 d, e and f) are hot mid-sized planets (~2.8 Earth radii, in between the Earth and Neptune), and the two outermost planets (Kepler-90 g and h) are temperate gas giants.
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