Activity for Josh Hyattâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #285964 |
Thanks for catching my mistake, I've corrected this. See [this comment](https://scientific-speculation.codidact.com/comments/thread/5923#comment-16673) for my explanation on the use of the word relativistic. (more) |
— | almost 3 years ago |
| Comment | Post #285964 |
Thank you for pointing this out. I had been under the impression that something moving at 10% the speed of light would experience some relativistic effects on a significant scale. I've corrected the question. (more) |
— | almost 3 years ago |
| Edit | Post #285964 |
Post edited: Fix kinetic energy calculation |
— | almost 3 years ago |
| Edit | Post #285964 |
Post edited: Relativistic is not applicable here |
— | almost 3 years ago |
| Edit | Post #285964 | Initial revision | — | almost 3 years ago |
| Question | — |
High-Energy Exhaust Shielding for Far-Future Drive Imagine a far-future spacecraft drive that accelerates its reaction mass to a small fraction the speed of light (say, 1,000 km/s). Say the mass flow rate to the drive were 1kg/s, and say the reaction mass were hydrogen. what effect would the resulting exhaust have on humans? On other spacecraft? If f... (more) |
— | almost 3 years ago |
| Comment | Post #280613 |
@Peter Taylor The craft is at periapsis in a highly eccentric burn. If it continues along its path, it will certainly move away from the planet. If, however, it burns directly towards the planet at the right acceleration, the periapsis will move with the spacecraft, but the eccentricity will stay the... (more) |
— | almost 4 years ago |
| Comment | Post #280613 |
@Mr Bumble OP updated. (more) |
— | almost 4 years ago |
| Edit | Post #280613 |
Post edited: |
— | almost 4 years ago |
| Edit | Post #280613 | Initial revision | — | almost 4 years ago |
| Question | — |
Centripetal Burn in Orbit Imagine a spacecraft in a highly eccentric orbit. Say the craft burns at periapsis towards the planet such that its orbital eccentricity does not change and the craft's periapsis moves with the ship so the two stay at the same point at all times. This would result in a circular orbit, but a faster or... (more) |
— | almost 4 years ago |