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Re: predicting position of earth, moon and sun



"flacco" asked:
 
> i'm looking for techniques for predicting dates on which the
> position of the moon and sun as seen from a given position on
> earth are as follows:
> 
> - the sun is near sunrise
> - the moon's position is near the horizon, above the point
>   of sunrise.
 
Something approximating that occurs every lunation, or about
13 times per year.  Any calendar which shows the phases of the
Moon will give you a pretty good idea of the dates you are
looking for.  Just look to the eastern horizon one to two hours
before sunrise (check your local newspaper or TV weather for
time), two days before new moon.  Sometimes a very thin crescent
can be seen just one day before new moon, and sometimes you may
be best off looking three days before.
 
If you want to do the same thing just after sunset, look in the
west one, two, or three days *after* new moon.  I missed seeing
it this evening (the sky was overcast earlier in the day), but
the Moon should have been in the right place for this a few
hours ago.
 
If you want a particular angle of the Moon's "horns" with
respect to the horizon, you may have to wait a year until the
alignment is approximately the same again.
 
  -- Jeff, in Minneapolis
 
.



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