Definitely rejected astronomy acronyms
I trained the 117-million parameter GPT-2 model from OpenAI a set of ~200 example astronomy acronyms and their definitions. A short list of rejected mission names:
FUK Lens in Single Ultraviolet section
Pipeline For Brain-Ray Intergalactic Anal Programming
Jumps Uterally from The Galaxies
Orgasmic Plasma Physics Experiment
Orgasmic Pollution in Space