Activity for Joshua Sniderâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
How far away could Earth detect a projectile travelling at relativistic speeds? Suppose our alien neighbors woke up on the wrong side of the bed and decided humans would be less annoying if their home planet was hit with a giant artillery shell travelling at half the speed of light. At what range would modern day human astronomers be able to detect it? The specifics of the situ... (more) |
— | over 9 years ago |
| Question | — |
Habitability of an icy volcano planet Suppose we have a rocky planet (somewhere between Earth- and Super-Earth- sized) orbiting a star far enough away that it would be around Pluto's temperature if sunlight was the only heat source. If we give it a thick molten core and large amounts of volcanic activity that bring its surface temperatur... (more) |
— | over 9 years ago |