3 The Sun- Our closest star

1. Star

A big ball of hot gas that shines in the sky.

2. Orbit

The path that Earth and other planets take around the Sun.

3. Solar System

The Sun and all the objects that move around it.

4. Hydrogen

A gas that makes up most of the Sun.

5. Helium

A gas that the Sun turns hydrogen into, making energy.

6. Planet

A large object that orbits a star and does not produce its own light.

7. Moon

A natural satellite that orbits a planet.

8. Asteroid

A small rocky body that orbits the Sun, mostly found in the asteroid belt between Mars and Jupiter.

9. Comet

A small icy body that, when passing close to the Sun, heats up and begins to release gases, forming a glowing coma and sometimes a tail.

10. Galaxy

A huge system of stars, gas, and dust held together by gravity; our galaxy is called the Milky Way.