Re: How would astronauts lost on a flight in a distant galaxy measure time?

Certain tools would needed to be able to measure time in any standard unit. It wouldn't be very hard if there was a watch or a clock around- even if it was about to stop. All one would have to do is find some regular motion around them, such as planetary orbit, galactic spin, anything, and compare that against the passage of a standard time unit. So, then they would know, every time so-and-so galaxy completes one- millionth of a spin, 24 hours have passed. Something like that. Alternatively, if no time-keeping devices were available, but a powerful telescope was, one could try to find the Milky Way. Since it is known how long it takes for the Milky Way to spin around once, they could just watch the Milky Way to keep track of time. Of course, remember, for each of these ways, many skills and precise devices would be needed. However, astronauts tend to have both of these things available to them on flights. If these astronauts had no time- keeping devices, no communications, and no equipment to observe space, then the exact amount of time passing would probably be the least of their worries!