The Kepler-90 system consists of eight known planets, all following close orbits of their star (so close indeed that all eight lie within the distance from the Sun to Earth). Kepler-90 b is the innermost of the eight planets, at just eleven million kilometres (0.07 AU) from the dwarfstarKepler-90. At this extremely close distance, it completes its orbit rapidly, so that a 'year' on Kepler-90 b would last a little over seven days.
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