Please forgive me if I'm not thinking right.
Imagine that we could put an object travelling near the speed of light and that it was powered by some sort of nuclear battery.
Regarding the different relative time in the laser itself (since it's travelling at high speeds) and the time of an observer (say in Earth), would we see that the laser would be emitting less and less photons as its speed increases because the time for radiative recombination of the laser would pass slower?
EDIT: If the answer is yes, is it possible that we are missing some celestial bodies because they are moving away at a near lightspeed comparatively to us?
EDIT2: The main problem here is the time that it takes to emmit a photon