[guigui]

Well done! I could spend a long time on this.

One minor suggestion: you should make the labels clickable instead of just the planets/stars. I found it difficult to click on a tiny pixel on screen.

[derbOac]

... also the orbits themselves ideally? Maybe I missed it but in looking at some of the larger orbits it was hard to zoom in and out to figure out what orbit went with what. It would have been nice to more easily click on the orbit.

I really like it though.

[fuzzythinker]

Seconded. Also, please make the non-planet labels brighter. The contrast isn't good enough to read it.

[aaroninsf]

After 90s of playing I came back to add the same comment :)