Our star, the Sun is a big ball of gas And it's 99 percent of our solar system's mass It's an average star in our Milky Way Warming the Earth every day What powers our Sun and makes it so bright? Come on and tell me, what makes all that light? Hans Bethe long ago reached the conclusion It changes Hydrogen to Helium by nuclear fusion When fusion takes place light is created And it makes its way out (although rather belated) Through the Photosphere that's the part that we see The light comes out and shines on you and me About a million Earths could fit in the Sun But if you were there you wouldn't have much fun It's six thousand degrees at the photosphere And much hotter inside the solar atmosphere