Platypus: Pride O' the Cosmos Sticker Sheet
Do you, like nobody, hate tee-shirts or just don't want to spend $30 on one? Then get these stickers. Same scientifically validated proclamation, same fantastic art, same lesson in astrophysics, but these you can stick on computers, printers, doors, tool boxes, slightly curved surfaces, car bumpers, bike frames and fenders (the main sticker of the beast won't fit, but Saturn etc will).
These are made by Sticker Mule. If you or your business needs stickers, you can't do any better than Sticker Mule stickers. They're made in the U.S., are weather and fade resistant, peel off without ripping (the Bikes Block Batons and Dump Trump stickers I put on poles on the way home get removed by somebody within a week, without leaving a trace), and they're mysteriously stretchy.
$2 of your purchase goes to the Australian Platypus Conservancy.