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.
Fist of the North Star (2005 video game)
Below each character's lifebar is a gauge with seven "stars" in the shape of the Big Dipper. Special moves, supers, and some command normals can remove varying numbers of stars. Once empty, a final "Death Star" or "shichousei" will light up and the other player can perform a special "Fatal KO" attack that can instantly defeat them, regardless of their lifebar (similar to the Instant Kill attacks in Guilty Gear.). The biggest difference is these moves may be easily comboed into, making them far more practical than their Guilty Gear counterparts. Players regain two stars at the start of each round, and one star any time an opponent unsuccessfully attempts to Fatal KO. After being Fatal KO'd, if the match is not over, that player starts the following round with all seven stars replenished.