First, several awards:

Oxymoron of the week to m1omg for 'real SCI-fi.'

Dry humor of the week to Grant for 'I'm in no position to comment.'

Relativity grasp of the week to What Max for 'their velocity with respect to what?'


More seriously, distant pulsars have been proposed as fixed beacons for navigating. If you know what the apparent pulse rates were when you left, and what they are when you lose power, and their directions, then you should be able to calculate both where you are and how fast you are moving with respect to your departure point.

Regards, John M.