Yes of course. Although it loses some of its shock factor once you hear a bit about measure theory

This might be more achievable than it sounds: there is quite a bit of space content on Mastodon already. Seti have an official account along with several astronomers, observatories and astrophysicists. Nasa possibly used to have an official account that has gone inactive. I can’t see any astronauts there at the moment but that could easily change