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Tim Auton wrote in message . ..
(AA Institute) wrote: Before anybody gives me that look... Too late I wouldn't want to be on an orbital space station with some loon blowing up asteroids around the same planet. Fair comment, I wouldn't want to either! So what do *you* think would make a nice, comfy orbital colony? I mean we've tried the Salyut, Skylab, Mir, ISS... and god knows whatever else is coming next, with frankly very little in the way of establishing a permanent presence in space. Granted, these were highly *essential*, interim experience and confidence building steps. I doubt very much I would have had the confidence to put forward starship designs with biospheres and orbital engineering projects with asteroid hollowing, had it not been for these early successful steps. So, do we need a scaled up version of another ISS style station in a higher orbit around the Earth or would it be more beneficial to grab an asteroid and try a fresh approach? If the asteroid is carefully selected using prior robotic surveying, it may offer us a wealth of mineral resources as a bonus. And part of its excavation toward building a habitat would come from the mineral mining. I hear a lot of noise about "mining the sky", and how asteroid mining could become HOT property in the future. But how many of those noise-makers have the vision to say let's grab an asteroid around the Earth, where it would be infinitely easier to mine? The AA Institute is the *FIRST* science authority on this planet with the exceptional foresight, courage and boldness to put forward such confident and robust proposals!!! AAI |
#12
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Also, all these man made satellites have position keeping thrusters, to
compensate for things like the moon. I have no idea as to what would happen to this "ring" if they suddenly just turned them all off, but I don't think anything major would happen very fast. I've changed my mind about 20,000 km as a *safe* perigee height, as it will endanger geostationary satellites orbiting in a constellation at 35,700 km. If the perigee of the asteroid's orbit is 40,000 km and say the apogee is 200,000 km then that may be a safe option. If the apogee goes much above 250,000 km then there's the Moon's perturbing influence to worry about, since it orbits at around 380,000 km. Great, now all I need to do are some 'back of the cigarette packet' calcs that show the Delta-V requirements to achieve a capture. I hope no one gets too alarmed by all this... it's just some fun calculations over a fun idea, which may or may not come to fruition one day (depending if there's public support). Abdul |
#13
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#14
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"AA Institute" wrote in message
om... I hear a lot of noise about "mining the sky", and how asteroid mining could become HOT property in the future. But how many of those noise-makers have the vision to say let's grab an asteroid around the Earth, where it would be infinitely easier to mine? The AA Institute is the *FIRST* science authority on this planet with the exceptional foresight, courage and boldness to put forward such confident and robust proposals!!! Ummm... NASA funded some studies of capturing asteroids in HEO using mass-driver reaction tugs back in the 1970's. http://members.aol.com/sandycombs/asteroid.jpg from http://members.aol.com/oscarcombs/gallery.htm -- Regards, Mike Combs ---------------------------------------------------------------------- Member of the National Non-sequitur Society. We may not make much sense, but we do like pizza. |
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Good idea, but this calls for another level of robotic articulation.
Perhaps a fly around robot with a vacuum cleaner style of suction mechanism, pulling stuff into heavy duty plastic bags could do the trick. A vacuum cleaner for solid debris... ....in a vacuum! Priceless! Martin -- M.A.Poyser Tel.: 07967 110890 Manchester, U.K. http://www.fleetie.demon.co.uk |
#16
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"Mike Combs" wrote in message ...
"AA Institute" wrote in message om... I hear a lot of noise about "mining the sky", and how asteroid mining could become HOT property in the future. But how many of those noise-makers have the vision to say let's grab an asteroid around the Earth, where it would be infinitely easier to mine? The AA Institute is the *FIRST* science authority on this planet with the exceptional foresight, courage and boldness to put forward such confident and robust proposals!!! Ummm... NASA funded some studies of capturing asteroids in HEO using mass-driver reaction tugs back in the 1970's. Alright... but were they *cranky* enough to suggest carving it out in orbit... give the Earth its first *naturally* composed rings that will brighten our night skies with an awe-inspiring silvery light... and build a colony inside the captured rock... that will eventually get blasted off towards Alpha Centauri one day???!!! - LOL... I think not. First? second? doesn't really matter. I am only interested in what's in our best interests. I admit, may be the commercial and technology viabilities will rule out asteroids, but I like to think not. Abdul |
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#18
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Herb Schaltegger wrote in message ...
In article , (AA Institute) wrote: If the perigee of the asteroid's orbit is 40,000 km and say the apogee is 200,000 km then that may be a safe option. If the apogee goes much above 250,000 km then there's the Moon's perturbing influence to worry about, since it orbits at around 380,000 km. There's ALWAYS the Moon's perturbing influence to worry about. Have you ever done any three-body problems? Not really, but I do fully appreciate that anything other than 2-body does not have a 'closed' analytical solution. (If you've ever been in a 'love triangle' then you'll know exactly what I mean!) There's a reason they can't be done analytically, you know. I wonder if NASA or other space authorities have done any ring modelling around the Earth... perhaps the question never cropped up before. I certainly think a twisted idea like carving out an asteroid in orbit is probably outside the normal *appropriate* rules of conduct in spaceflight research! I expect it's something they will have to study in the future. No matter what kind of orbital colony you establish, their effluence will need disposal into space and sooner or later you'll end up with a ring around the habitat scattered along its orbit around the Earth. Any micrometeroid impacts will also result in a scattering of debris over hundreds of years. Especially when one of the objects is massive enough to cause tides on the other object from 225,000 miles away, as well as influence menstrual You don't think the woman's cycle could be a coincidence? Abdul |
#19
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In article ,
(AA Institute) wrote: Especially when one of the objects is massive enough to cause tides on the other object from 225,000 miles away, as well as influence menstrual You don't think the woman's cycle could be a coincidence? Um, not really. The lunar cycle affects a great deal of human behavior. See, e.g., http://www.ncbi.nlm.nih.gov/entrez/q...PubMed&dbFrom= PubMed&from_uid=14664724 -- Herb Schaltegger, B.S., J.D. "Never underestimate the power of human stupidity." ~ Robert A. Heinlein http://www.angryherb.net |
#20
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In sci.space.policy AA Institute wrote:
Herb Schaltegger wrote in message ... In article , (AA Institute) wrote: If the perigee of the asteroid's orbit is 40,000 km and say the apogee is 200,000 km then that may be a safe option. If the apogee goes much above 250,000 km then there's the Moon's perturbing influence to worry about, since it orbits at around 380,000 km. There's ALWAYS the Moon's perturbing influence to worry about. Have you ever done any three-body problems? Not really, but I do fully appreciate that anything other than 2-body does not have a 'closed' analytical solution. (If you've ever been in a 'love triangle' then you'll know exactly what I mean!) There's a reason they can't be done analytically, you know. I wonder if NASA or other space authorities have done any ring modelling around the Earth... perhaps the question never cropped up before. I certainly think a twisted idea like carving out an asteroid in orbit is probably outside the normal *appropriate* rules of conduct in spaceflight research! Google "how the moon was formed". |
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