Activity for William Davisâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Interstellar Propulsion for Hard Sci-fi Novel Hypothetical: Hundreds of years into the future. Humanity needs to travel to exoplanets quickly. I'm aiming for hard sci-fi. What kind of propulsion can travel people at 0.1 - 0.9 lightspeed? Is it possible to build a laser sail so powerful that a spacecraft 3 km by 3km with people and life systems ... (more) |
— | almost 6 years ago |