1. Jupiter’s moon Europa
Assumptions:
1. Distance to Sun remains constant
2. Surface temperature is uniformly 80º K.
3. No collisions with Europa occur to restart processes of differentiation.
4. Entire subsurface ocean solidifies.
5. Radioactive decay has ceased to contribute a significant amount of internal heating.
6. Europa has no atmosphere.
7. Europa is spherically symmetrical.
8. Europa becomes tidally locked and tidal heating ceases to contribute to internal
heating.
9. The subsurface ocean maintains a uniform temperature of 277.15º K.