next to the power of the Force'---Darth Vader http://zzwave.com/plaboard/posts/3957375.shtml
There's a similar exercise in Chapter 15 of Alonso&Finn's Physics,one of my physics reference books in my last yr of HK hi school
It means it'll take the sun's entire energy output for 0.58 million seconds to blow up a earth
size planet assuming 100% efficiency converting solar E.M. energy to mechanical energy,
not in split second as in the movie