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Charting the system…

KOI-351

a real F-star system, 2,764 light-years away8 planets← All exoplanets
Host star

KOI-351

Type
F-type (White)
Temperature
6,080 K
Radius
1.2 ☉
Mass
1.2 ☉
Known planets
8
Luminosity
1.86 ☉

Published by the NASA Exoplanet Archive. These planets’ temperatures and habitability scores are computed from this star’s measured luminosity, not from a stand-in for its class.

KOI-351 b — 0.07 AUKOI-351 c — 0.09 AUKepler-90 i — 0.12 AUKOI-351 d — 0.32 AUKOI-351 e — 0.42 AUKOI-351 f — 0.48 AUKOI-351 g — 0.72 AUKOI-351 h — 0.97 AUKOI-351 bKOI-351 cKepler-90 iKOI-351 dKOI-351 eKOI-351 fKOI-351 gKOI-351 h
KOI-351 b
KOI-351 bLava WorldHabitability 0 · Uninhabitable0.07 AU · 2.27 M⊕
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KOI-351 c
KOI-351 cLava WorldHabitability 0 · Uninhabitable0.09 AU · 1.81 M⊕
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Kepler-90 i
Kepler-90 iRocky TerrestrialHabitability 11 · Uninhabitable0.12 AU · 2.3 M⊕
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KOI-351 d
KOI-351 dIce GiantHabitability 9 · Uninhabitable0.32 AU · 8.6 M⊕
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KOI-351 e
KOI-351 eBarrenHabitability 30 · Extremely Harsh0.42 AU · 7.56 M⊕
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KOI-351 f
KOI-351 fIce GiantHabitability 16 · Uninhabitable0.48 AU · 8.65 M⊕
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KOI-351 g
KOI-351 gGas GiantHabitability 26 · Extremely Harsh0.72 AU · 15 M⊕
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KOI-351 h
KOI-351 hGas GiantHabitability 34 · Extremely Harsh0.97 AU · 203 M⊕
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A binary star system's orrery: two suns close together, a red dashed dead-zone boundary, and a debris trail left by a destroyed world

New: Binary Star Systems 🌀

A system can now orbit two suns. Add a companion star when you build one — close, medium, or wide — and the physics decides what survives: a shared center of mass carves out a dead zone where gravity from both stars tears a world apart, leaving it as debris, and every surviving planet's orbit goes elliptical, moving fastest at closest approach and slowest out at aphelion. Push the separation to wide and the dead zone opens tens of AU across, wide enough to gut a system that would have been stable around one star alone. Stand on a world that made it through and you'll watch two suns cross the sky together.

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