There are actually eight planets in our solar system, not six.

Here's the list in order from the sun:

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune

Perhaps you were thinking about the inner planets (Mercury, Venus, Earth, and Mars), which are smaller and rocky, or the outer planets (Jupiter, Saturn, Uranus, and Neptune), which are larger and gas giants.