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    Re: Navigation on other planets
    From: Lu Abel
    Date: 2014 Feb 21, 14:29 -0800
    Orbit GPS-like satellites.   Set up Loran-like transmitting stations.

    The technology to get to a planet, any planet, outside our solar system would be so far beyond what we have today one would wonder why we'd fall back to an 18th or 19th century technique for navigating.

    Plus let's not forget that positional information is available from celestial navigation only intermittently.

    From: Sean C <yhshuh---.com>
    To: luabel{at}ymail.com
    Sent: Friday, February 21, 2014 2:16 PM
    Subject: [NavList] Navigation on other planets

    Hello all,
    I was just watching a video about the Kepler Space Telescope. The narrator said that there are up to nine billion planets in our galaxy which are roughly the same size as Earth and with the same potential for liquid water.
    If, in the future, we were to visit one or several of these planets, how would we navigate around their surfaces? With INS, celestial, some other method or a combination of these?
    If the primary means were celestial, how hard would it be to work out an almanac for a distant planet? How about refraction corrections? (I assume dip would be the same.)
    Just curious about everyone's thoughts on this.
    -Sean C.
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