China plans manned moon mission

Discussion in 'World Events' started by cosmictraveler, Jan 3, 2012.

  1. ElectricFetus Sanity going, going, gone Valued Senior Member

    Messages:
    18,523
    Or you could just look up the tables of pre-calculated delta-v themselves, as I lack the Internet resources to do so, please see if you can find a Internet version of that book.

    No not decades but thousand even millions of years, which is why there exists a population of NEA with very similar obits to the begin with.

    Maybe its a scam, heck even commercially viable ideas can be scams, all that is really required is someone to run off with the money.

    Actually returning to earth is the very low delta-V part, its getting there that is usually equal to the delta-V of going from LEO to LLO, its the getting back from a NEA that can be considerably less then getting back from lunar surface to the earth. So it makes sense that the Asteroid mine produce its return ships. Space electrolysis or even better direct thermal-solar lysis of water would not be impractical nor heavy: a 50 meter wide inflated reflector would focus 2.5 MW of sun light at 1 AU, at 40% efficiency (practical efficiency for thermal cracking of water) that 1 MW into fuel production, or 26 kg of H2 and 207 kg of O2 an hour, thats 230 tons of H2 and 1820 tons of O2 a year, for comparison that enough to fill 8 Saturn V upper stages. Total weight below 10 kg/kw should be possible with solar thermal lysis (more like 50 kg/kw for solar electrolysis and a far more complex system), thats only 10 tons for the water lysis, of course we would need to add the weight for cryogenics and solar electrics for powering those system. Assuming all that in total took up 45 tons that would have been just one flight of the old Saturn V to put that into earth escape velocity.
     
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  3. Epictetus here & now Registered Senior Member

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  5. anky2930 Banned Banned

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    US should be assisting them in the effort.
     
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  7. KilljoyKlown Whatever Valued Senior Member

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    6,493
    Why not the other way around. After all we were first.
     
  8. Diode-Man Awesome User Title Registered Senior Member

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    1,372
    Ching dow dong chong waing?

    TRANSLATION:

    Will you be the first person to have sex in space, please?
     
  9. Epictetus here & now Registered Senior Member

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    第一次吻我。Dì yīcì wěn wǒ. (Kiss me first).

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  10. Workaholic Registered Senior Member

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    135
    Actually what you wrote is more accurately translated as: The first time he/she kissed me.

    Kiss me first would be 先吻我

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  11. wroberson Registered Member

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    30
    One thing is for sure. They won't mislabel a classified mission film and put it in the National Archives. No way. I got burned the first time. No this one...
     

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