When a robot on Mars does something like take a picture, how does it date that file? I imagine that the responsible laboratory is a possible referential, correct?
Is it possible / does it make sense to create a common reference to compare data (for example) made in different points of the solar system, so that it can be chronologically ordered in an easy way?
In my mind if we are going to have a community on Mars, we will not be able to use referential from here to the files made there, so would it be necessary to have a common referential? something like how many laps the sun went around itself from a zero mark?!?