My kids learned in school (during the 5 minutes of the year they spent talking about the solar system) that Venus is closer to Earth than Mars, but I had to use a diagram like this to explain that that's only sometimes true
kind of limiting that you can only go back and forward in time one month though. I would love a slider, a play button
It’s also lua-scriptable. I once created a “tour of the solar system” script that worked like a presentation (hit a button to advance to the next view) for my wife to use in her classroom, in an afternoon, never having scripted the program or written Lua before. Did a top-down view with orbital tracks, zoomed to planets, did side-by-side size comparisons, all kinds of stuff. Not hard to use, very cool. Or you can just click around the UI and use keyboard shortcuts to demonstrate quite a bit of stuff.
If you want orbits and a slider, there's <https://www.pbslearningmedia.org/resource/buac20-sci-ess-wwt...>