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