It is where you can click a button and you choose an object from a dropdown menu, and choose evening, morning, or midnight, and it will (with the rotation) show your objects every day move throughout the sky like a star chart but with your objects! I made some comets that pass by planet f and I wanted to see how every day, the comet moved and stuff. In addition, you should make a magnitude thing, and show like a line that tracks it. And a button PLAY (which is frames for each day) or a go ahead 1 button. Do you like the idea? I think that my comet got from evening to morning in like 4 days. I wanted to know. so, yeah...