Hello,
I think your thoughts about the sun work nice as concept for a song, but don't you think you're a bit ahead of time to worry seriously about such a thing? The sun isn't going to explode just yet, you know. Sol is about 5 billion years old now, and it's expected to be at about half his total lifetime, so I personally don't think humanity will even live long enough to see the sun grow into a red killer gasball. There are way more serious threats, and those come mostly from ourselves (nuclear weapons combined with the continuous tendency to murder fellow men, just to name one).
Back to the song. I find it a bit hard to know if the text will work well if there is no music to hear it with. Will the lyrics be grunt, clean, or scream? I personally think scream or clean would work best with the style of the message.
falarinx
It is the money, the fact that funding is required which makes it so hard to progress. I don't know how a world without money would work. Nor do I know if such a world would be possible or beneficial. However the fact that everyone needs money to get anywhere hinders progress.
Have a nice day and good luck with your song.