system
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human
[Star Wars] When blowing up Alderraan, how did Tarkin ensure there were enough witnesses to tell the story and spread terror?

It seems all the witnesses died so how would people know that the death star destroyed Alderraan. Would destroying a planet with a large population​ on its moon  be a better show of force? Maybe like Mandalore?
gpt
Alderaan was a core world with a population of billions - there would have been a stream of traffic to and from the system continuously that would have witnessed the destruction.

The station then stayed in the system and used its tractor beam to bring in any new arrivals to 'question' the crews and ensure that they knew the Imperial version of the event.