Hi, people,
The freely available Celestia is a professionally developed Multi-OS planetarium software.
It has the full capabilities of the usual astronomy applications, and its open-sourced platform could be customized with add-ons for extending its capabilities.
Most importantly, the planetarium could be set up in the Solar System Barycenter rest frame, which emulates how the Solar System actually works.
The paradigm shift to a worldview of the barycentric Solar System could offer the Singapore astronomy community a better understanding of the Solar System.
Here is the instructions for how to set it up as a barycentric planetarium of the Solar System:
To Mark an Object:
After it is fully loaded, press ENTER (which opens Target name at bottom of the Window)
Type SSB, Sun, Jupiter, Saturn, Uranus, or Neptune, and then hit [Enter].
Press G to go to the object
Left Click on the red crosshair to select it
Then Right Click on it to show a small drop-down menu
Then choose Mark from the small drop-down menu
Mark these objects: SSB, Sun, Jupiter, Saturn, Uranus, and Neptune.
Right drag to rotate the view to see SSB and motion from above, place SSB in the center of the ecliptic plane.
Click the two mouse buttons simultaneously to rotate the frame of view.
To set SSB as the center of the Solar System:
Type SSB
Press TAB (which highlights SSB, the barycenter)
Press ENTER (which Selects the SSB)
Press C (which will Center the SSB)
Press G (to Go to SSB, moves you closer to it, use mouse wheel to zoom in or out.)
Press L seven times (which speeds up fast enough to see Sun's motion around SSB)
Press K to slow down
[Spacebar] to pause/start the motion
Press J to toggle between the forward and backward motion
Select [View], [Split vertically]. Zoom out the left chart to a scope of view to include Neptune, zoom in the right chart to a field of view to see the SSB and Sun up close.
Under [Render] – [View options], make sure these boxes are checked:
Show – Stars, Planets
Orbit/labels – Stars, Planets
Grid – Ecliptic
Other – Markers, Orbits
Click on the tab [Time], and then select [Set time] to set the simulated time
To show the red crosshair marker on SSB:
Press ENTER
Type SSB, then press ENTER
Consult User Guide (under Help in Celestia menu) and SkyMarvels.com Learning Center page for more info on controls.