A sun in somebody else's sky

Been listening to Pearl Jam's 'Black' a lot lately, and got this idea from the line "I know one day you'll have a beautiful life, i know you'll be a sun in somebody else's sky, but why, why, why, why can't it be, why can't it be mine?". It's a bit busy at work so this i slipped in between jobs; i'll probably give it another go. But what a great song and a heart-braking line.