I'm not Eldmannen but I know the answer (for a change!):
OpenGL is the vendor-neutral, multi-platform standard for high performance 2D/3D graphics on devices ranging from mobile phones to PCs to Supercomputers.
The program runs on my ancient computer (made about the time our own sun was forming) so you should have no problem. It's a pretty cool program.
OK, I didn't know the answer, I looked it up... that's as close as I usually get to actual knowledge.
Eldmannen, I thought the amount of control you showed over the "astrology" correction was astounding!
Will download now.
Very interesting! Have managed to work most things out. The night sky constellations are well done.
Only query I have with it, is do you think they have taken into account that strange British querk of British Daylight Saving Time? I ask as it seemed to get dark an hour earlier than it should have. (I know I could just rewind the time)