Activity for Dougâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Could an advanced species, having evolved on a large planet with a deep gravity well, be helped out of it from above? Suppose an intelligent species evolved on a large rocky planet, one with sufficient mass that the species had little hope of developing anything anytime soon that could achieve escape velocity. They're stuck in a deep gravity well. Whereas we've been able to use rockets to exceed Earth's escape veloc... (more) |
— | over 9 years ago |