Finally we saw these two windows:

In the upper Universe all stars are the same brightness, while in the lower, distant stars are darker than closer ones.

We know that stars come in all shapes and brightnesses, so some close stars could be dim, while distant stars could be bright. But light spreads out as the square of the distance. In our simple program, the correlation is perfect: distant stars are always the dimmest. Once again, we use this as a cue to distance. The lower window seems to be the most realistic of all our simulations. Even though your computer screen has no real depth, the starfield creates the illusion of depth.

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