Activity for Patrick Gallantâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Celestial bodies and gravitational effects on the Earth I am doing some research for a science fiction novel. I need to have a planetary body around 10,000 km in diameter appear in the Solar System near the Earth and proceed to orbit it artificially. I want to know how close the planetoid could get before it would before it would apply catastrophic effect... (more) |
— | over 9 years ago |