feature request: labels of star constellations

[hsdk123]

Hi, this is really a great project - the great visualisations are enabling me to finally be able to grasp how our solar system revolves.

Just a quick feature request - I notice that the visualisation already contains line connections to depict constellations. It would be great if these could also be labelled (or to have a checkbox option to display / hide these labels: especially the 12 main constellations we use for zodiacs)

It would also be nice if there was a setting that would allow one to see how the sky looks when we are to just continuously look up at the sky from one point on the earth. (I'm not sure if this is currently possible)

Thank you for a great project!