>
>
>  An orbital-motion visualisation application. It displays Keplerian
> orbits using an intuitive graphical interface, for both satellite
> dynamics and planetary astronomy. Orrery displays solar system
> bodies including the sun and planets, minor planets, and our moon,
> as well as earth satellites and stars. It
>  is optimised for classroom presentation, but may also be used to
> determine visibility, look angles, and ground tracks. Orrery allows
> both plane projections and perspective views, with either user-
> selected view angles or automatic tracking.
>
>

An orrery is a mechanical apparatus showing the relative positions and
motions of members of the solar system. It is named after [The Fourth
Earl of Orrery, Charles Boyle][1], 1674-1731, for whom an early model
was made (definition from Funk & Wagnalls Standard College Dictionary)

DL #1 Orrery v1.0 PPC
Dl #2 Orrery v1.2 PPC

Compatibility
Architecture: PPC

Orrery requires system 7, and this first release is only for PowerPC.
It uses about 530K of disk space, and needs about 2 Mb of RAM to run
comfortably. With a large monitor or with several windows open, 4 Mb
is better.

  [1]: https://en.wikipedia.org/wiki/Charles_Boyle,_4th_Earl_of_Orrery

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