it will give you a feeling of a spaceship moving in space
another function could show planets and nebulae with different speeds
you can also tweak it a little bit and create different transition speeds for stars depending on their sizes
so larger stars will move faster because they are nearer, and smaller ones will move slower
removing objects might sound a bit weird!!
the proper way is just removing the object that finished its transition, but i don't why it didn't work out
some were removed, and some were not
so i had to write a loop