Lyrics:

The sun is a mass of incandescent gas
A gigantic nuclear furnace
Where hydrogen is built into helium
At a temperature of millions of degrees

The sun is hot
The sun is not
A place where we can live
But here on Earth there'd be no life
Without the light it gives

We need its light
We need its heat
The sunlight that we see
The sunlight comes from our own sun's atomic energy

The sun is a mass of incandescent gas
A gigantic nuclear furnace
Where hydrogen is built into helium
At a temperature of millions of degrees

The sun is hot
(The sun is so hot that everything on it is a gas
Aluminum, copper, iron, and many others.)
The sun is big
(If the sun were hollow, a million Earths would fit inside.
And yet, it is only a middle-sized star.)
The sun is far away
(about 93 million miles away, and that's why it looks so small)
But even when it's out of sight
The sun shines night and day

We need its heat
We need its light
We need it's energy
Without the sun without a doubt there'd be no you and me

(Spoken)
Scientists have found that the sun is a huge atom-smashing machine.
The heat and light of the sun are caused by nuclear reactions between hydrogen, nitrogen, carbon, and helium.

(Singing)
The sun is a mass of incandescent gas
A gigantic nuclear furnace
Where hydrogen is built into helium
At a temperature of millions of degrees