Here's another shirt from Design by Humans. This one is made by the user, kellabell9, and is entitled 'Minimal Solar System'. If the photo in the Amazon link below doesn't match the color above, don't worry. Once you click on it the other colors will be made available to you.
Featured on The Big Bang Theory episodes
S10 E17: "The Comic-Con Conundrum" S11 E03: "The Relaxation Integration"