Difference between revisions of "Mesogravity"
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== External links == | == External links == | ||
| − | * | + | * [https://en.wikipedia.org/wiki/Ceres_(dwarf_planet) Ceres_(dwarf_planet)] |
| − | * | + | * [https://en.wikipedia.org/wiki/4_Vesta 4 Vesta] |
| − | * | + | * [https://en.wikipedia.org/wiki/16_Psyche 16 Psyche] |
Revision as of 14:41, 29 July 2021
- Gravity Much lower than the one of planets
- Gravity much higher than what is considered micro-gravity (minute residual tidal forces and such)
Contents
Possible lower limits
- Gravity of human built structures?? This will grow though ...
- Gravitational effects well perceptible by human senses without advanced measurement devices
– e.g. drift around and in caverns inside of asteroids
– this one seems better but still vague
Possible upper limits
- Everything that a body not rounded by it's own gravity can deliver. Asteroid Vesta 0.025g ~ 0.25m/s^2 ? – this is already pretty high
- Gravity of the biggest asteroid in the asteroid belt – the dwarf-planet Ceres 0.029g – similar – seem too high
- Gravity of the biggest metallic asteroids (Psyche ~0.144m/s^2)
- For humans dangerous fall heights are notably bigger than optimal colonization cavity diameter (a few 100m) – this one is nice but wishy-washy
Safe fall in a in a colonization cavern
We know from Earth that a fall from 0.5m height @ 9.81m/s^2 is rather endurable.
So: v_max = sqrt(2*g*h) = sqrt(2*10m/s^2*0.5m) = ~3.2m/s
Assuming a cavity size of 200m
a_max = v_max^2/(2*d_cavity) = 10(m/s^2)^2/(2*200m) = 1/40m/s^2 = 0.025m/s^2
– that is crudely rounded about one eighth of what the larges asteroids have to offer (see above)
– so silicatic asteroids with half the diameter of the biggest ones are already small enough to are quite safe for ~200m diameter colonization caverns.
