Features

• Starfield stays fixed on screen under camera translation and zoom, as if at optical infinity.
• Planets stay fixed on screen under camera translation, as if at optical infinity. Motion during departure and arrival works correctly.
• Remove orbit and transit background asteroids, which drift behind planets.

Known Issues

As far as I can tell there is no existing API support for modifying the zoom response of planets, so planets still change size under zoom. Since the same functionally already exists on the star field I'm hopeful that the API request I'll open will make this possible.