| Yours | HD 180617 b | |
|---|---|---|
| Mass | 15.0 × Earth | 12.2 × Earth |
| Radius | 3.99 × Earth | 3.53 × Earth |
| Density (composition) | 1.30 g/cm³ | 1.53 g/cm³ |
| Temperature | 191.9 K | 202.0 K |
| Starlight received | 0.23 × Earth | 0.28 × Earth |
| Star temperature | 3,050 K | 3,534 K |
Small and distant: a quiet, stable companion.
Tidal braking locked the planet to its moon: one face forever moonward.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal heat sustains a subsurface ocean over a rock seafloor: a strong candidate for life (Europa-like, 89/100).
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Small and distant: a quiet, stable companion.
Merged with an adjacent moon: too close for both to hold a stable orbit.