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Kepler 90 Copy

28 Feb 2018, 14:16 UTC
Kepler 90  Copy

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.
 

Name
Mass(MJ)
Radius(RJ)
Period(days)
Discovery(date)

Kepler-90 b

0.117
7.01
2013

 Kepler-90 c

0.106
8.72
2013

Kepler-90 d

0.257
59.7
2013

Kepler-90 e

0.238
91.94
2013

Kepler-90 f

0.258
124.9
2013

Kepler-90 g

0.725
210.6
2013

Kepler-90 h

1.01
331.6
2013

Kepler-90 i

0.118
14.45
2017

 
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