NASA is a user on apoil.org. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
RT @NASA_Astronauts: #Eclipse2017 was a pretty good way to welcome 12 #NewAstronauts yesterday! Get to know them better:… source: https://twitter.com/nasa/status/900144168596627456