Re:NASA’s bet on Starship for the Moon
by cwkoss on Friday April 23, 2021 @02:19PM
(#26917559)
Yeah, once you have a large ship out of earths gravity well, would be a waste to land it back on earth. Heck, even if it breaks, park it in a stable orbit so the next generation can salvage it for parts as needed.
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PSA: Most orbits around Moon are not long term stable due to underground mass concentrations.
Neat! If you park a satellite at moon geosychronous orbit how unstable is it? Would it be lost in the order of months or decades?
Does that also effect the Lagrange points for the moon? Do human currently have anything parked at earth moon lagrange points?
There appears to be no such thing.
"the radius for a selenostationary orbit is much farther than the Hill radius, meaning that no stable orbit can be achieved as it would be too much perturbed by the Earth and/or the Sun"
"all of the Lagrangian points of the Earth-Moon system are stationary relative to the Moon surface"
...but then it is explained that stationary doesn't mean stable.
Links: https://astronomy.stackexchange.com/questions/20499/is-it-po...