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On Apr 21, 8:52 pm, Chris L Peterson <c...@xxxxxxxxxxxxxxxxxx> wrote:
> On Mon, 21 Apr 2008 10:48:09 -0700, David Weinshenker
>
> <daz...@xxxxxxxxxxxxx> wrote:
> >How would you measure the rotation: suppose you landed on this planet
> >from outer space, with your own time-measuring devices (that were marked
> >in some totally alien units, independent of Earthlings' "hours"), and
> >were wondering what the rotation period of the planet was. By what
> >observation would you take that measurement? (Observing the apparent
> >position of distant stars? Observing the position of sun? Using a
> >Foucault pendulum at the pole?)
>
> Which is very much the situation with us as the "aliens" when we measure
> the rotation period of every other body in the Solar System. We specify
> the period with respect to the stars (which is exactly what you would
> get with an inertial measurement, of course). In some cases, we
> _measure_ with respect to something else, such as an orbiting
> spacecraft. But then we convert to the inertial (sidereal) value.
> _________________________________________________
>
> Chris L Peterson
> Cloudbait Observatoryhttp://www.cloudbait.com
A clock is a clock,it does not have any magical properties and
basically functions as an object which keeps a regular pace.That is
all that was needed to determine geographical seperation where 4
minutes of clock time equals about 69 miles at the equator and
diminishing values further towards the poles,you can say it as 1
degree of longitude,or 1 degree of geographical seperation but
ultimately it is all held together by the original core principles
which distinguish natural noon and 24 hour clcok noon .
http://www.csgnetwork.com/degreelenllavcalc.html
I do not know why people here choose to insult the great structural
and timekeeping astronomers unless they have no self-respect and
genuinely want to believe in a correlation which has all the substance
of a flat Earth idea.
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