Activity for Banishâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Mirror to the past Are there any holes in the following reasoning? Black holes form gravitational lenses. So they bend light. Is it possible for an observer to see his own past image as a result of light bending around a few black holes? (more) |
— | about 5 years ago |
| Question | — |
Is a solar system around a black hole possible? Is it possible for there to be a "solar system" of sorts with a black hole and a few suns orbiting around it? Could that system be stable and (if so) would it be possible for some civilization(s) to exist on planets orbiting the stars and the black hole? (more) |
— | almost 6 years ago |