Physics and Star Wars
To estimate the effects of the second Death Star, Minton looks into its mass. According to estimated data from some students of Lehigh University, the steel mass needed for building one would be around 770 kilograms times the mass cubed in weight. This would give the Death Star of about ten to the power of nineteen kilograms in mass. Using this data, Minton produces equations that lead him to conclude the fragments would hit the moons surface so hard causing craters almost four times the size of the Chicxulub crater in Mexico. This impact would cause a planetary firestorm and vaporize all lifeforms on the moon.
Galactic Empire (Star Wars)
In "Star Wars", Grand Moff Tarkin explains the Empire's military doctrine of peacekeeping, internal security, and counter-insurgency; describing its state terrorism-philosophy as ""rule through fear of force rather than force itself"". The instrument of this power is the military, which includes the Imperial Stormtroopers, a massive fleet of 25,000 Star Destroyers, and the Death Star, a moon-sized superweapon capable of destroying entire planets. Plans for the Death Star first appear (in universe chronology) in "Attack of the Clones" and construction begins at the end of "Revenge of the Sith".