I'll assume a truly peaceful species (not vegetarians, peaceful towards everything they believe to be sentient) . No violence. No threats to sentient species. No posturing (implicit threats). They will FTL into any meteoroid-storm to rescue fellow sentients, brave any gamma ray excursion to bring help to fellow sentients. Their point defenses are just that good.

There was this one time where fellow sentients were in danger of being annihilated by a particularly insidious meteoroid swarm. A sequence of complex biochemical reactions had given rise to concentrations of fissile material, that had subsequently been carried, by an unfortunate, but really unavoidable sequence of events, towards the home planet of their fellow sentients. They stopped the radioactive meteoroids, and stopped the biochemical reactions giving rise to them (it would have happened again, they concluded after some sampling. Sad. Someday this primordial soup might have given rise to sentients) by supernovaeing the star of the system in which the biochemical reactions were taking place. The star was called Sol. Don't be like Sol. Be sentient.

(Some of the sentients they know happen into localized gamma ray excursions quite often. It's a mystery. They are investigating)

I'll assume a truly peaceful species (not vegetarians, peaceful towards everything they believe to be sentient) . No violence. No threats to sentient species. No posturing (implicit threats). They will FTL into any meteoroid-storm to rescue fellow sentients, brave any gamma ray excursion to bring help to fellow sentients. Their point defenses are just that good.

There was this one time where fellow sentients were in danger of being annihilated by a particularly insidious meteoroid swarm. A sequence of complex biochemical reactions had given rise to concentrations of fissile material, that had subsequently been carried, by an unfortunate, but really unavoidable sequence of events, towards the home planet of their fellow sentients. They stopped the radioactive meteoroids, and stopped the biochemical reactions giving rise to them (it would have a high possibility of happening again, they concluded after some sampling. Sad. Someday this primordial soup might have given rise to sentients) by supernovaeing the star of the system in which the biochemical reactions were taking place. The star was called Sol. Don't be like Sol. Be sentient.

(Some of the sentients they know happen into localized gamma ray excursions quite often. It's a mystery. They are investigating)