I noticed a possible bug - the chosen planet seems to have a "twin" in the same orbit. I was a bit confused by the sequence of the display choices, they might be rearranged or it could be explained why they are in this order. And do you think it will be developed further so that it would e.g. be possible to select the POV position in 3D space? Also, would it be possible (a huge upgrade probably) to connect the simulator to the real positions? And even generate views of how the sky would look? I mean, just now it is possible to view all the large planets in the sky during a single night, and Venus/Jupiter are very close to each other. It would be really cool if this simulation could be used to predict such events :-) But it is perhaps too ambitious?