I've been in federal service for my entire adult life. First in the military, where I was paid a salary, then in civil service, where like most civil service employees, I am NOT salaried. Rather, I fill out a time sheet, typically 40 hours a week. If I work at night, I get paid a little extra. If I work on a Sunday, also extra. Same for holidays. Overtime and comp time are factors in there too. So I was thinking about astronauts. Those that are military are I presume paid their normal military salary plus any hazardous-duty or other special pays. But what about the NASA employees? I found on a couple of searches that they're just on a regular GS pay scale and therefore hourly, non-salaried employees. When they're on the space station, I'm sure their duty hours aren't just 8 hours a day, 5 days a week. Do they fill out a time sheet? Do they get paid extra for nights, Sundays, and holidays? I assume they don't really have "days off", so do they log a ton of overtime just for normal operations? Do they bank it as comp time and take months off when they get back? If they have to handle some issue in the middle of their sleep period, do they log that as overtime too? Anybody know how this works?