1) OK. Also I found www.skyviewcafe.com, which is helpful.
2) But is the following similar? If I look at Polar Projection with
field width>270deg, I get a flat representation of the sky (I'm not
really sure how to interpret where I am looking from) with the
ecliptic oscillating up and down around the center. The planets, sun
and moon seem to appear in the left to right order I expect. So it
seems I am seeing the view from earth (but from where on earth?) of
the current relative position of the planets, right? Not the orbits
but the next best thing. This view is pretty cool too because
animation reveals the retrograde motions.
3) Is there any way to determine max planetary elongations?
Alan
--- In [email protected], John Mahony
<[EMAIL PROTECTED]> wrote:
> No, but check out <http://neo.jpl.nasa.gov/orbits/>. Shows 3D orbit
> simulations for any comet or asteroid, with the positions of all
> planets included (zoom out to see outer planets). Set it for a
> particular time (AD 1600 to 2200) and then step or animate forward
at
> any of several time increments. You can tilt/rotate, and center on
any
> object.
> -John
>
> --- Alan Gornik <[EMAIL PROTECTED]> wrote:
> >
> > Is there a way to use CDC to get a view of the solar system
> > looking "down" at the sun so you can get the relative positions
of
> > the planets at any given time? Likewise a way to track how a
comet
> > will pass through the solar system relative to the planets?
> >
> > Thanks.
> >
> > Alan
> >
> >
> >
> >
> >
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