Our sun is a . A star is a hot, glowing sphere of that gives off energy.

The Sun is an average star in many ways. It is medium-sized. It looks bigger and than any other star only because it is much closer to . The Sun and other stars are not solid like the ground under your feet. Instead they are made of . One important gas in the sun is . This is the Sun's fuel. The sun uses hydrogen to make and light energy. It gives off so much energy that it warms and lights earth millions of kilometers away.

On a clear night you can sometimes see a in the sky. Planets are satellites of the sun. A satellite is an object that moves in around another larger body. From earth planets can look like in the night sky. Planets are not stars however, they are smaller and than stars. Also, like the moon, planets cannot make .

The Sun, Earth, other planets, their moons and smaller objects make up the solar system.