Dear John!

If 35 Mya = "35 million years ago", I am afraid there is no software in
the world to help you (and nobody to check it :-) That's about a seventh
of the rotational period of the sun around the galaxy's center!

The computational basics for the planet positions used in Stellarium and
most other such programs can be trusted for a few millennia only.
Actually, the -99999 is already waaay tooo optimistic, I would not trust
it before about 6000BC (I cannot quote its published limits at the
moment). Not much exists on accurate planet positions etc. before 10000BC,
which surely is a pity.

For the stars, we can meaningfully extrapolate proper motions for a few
tens of thousands of years, so the limit seems to be meaningful to show
the stars at least approximately where they have been. For those long
times, however, take any random distribution. You will not recognize a
single constellation.

Best regards,
Georg


On Fr, 3.06.2011, 18:10, John Powell wrote:
> Hello.
>
> I am putting an astronomy presentation together for the National Park
> Service in the US.  I need to see what the night sky looked like 35 Mya.
> This wonderful app let me go back to -99999.  Is there a way to go
> further?  Help me Obi-Wan Stellarium, you're my only hope.
>
> Thanks,
> John
>


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