It's important to remember that Pluto is no longer classified as a planet, but as a dwarf planet.

So, the nine closest astronomical bodies to Earth, in order of their average distance, are:

1. The Moon: Earth's only natural satellite.

2. Venus: Earth's closest planetary neighbor.

3. Mars: The fourth planet from the Sun.

4. Mercury: The smallest and innermost planet.

5. Jupiter: The largest planet in our solar system.

6. Saturn: The second-largest planet, known for its rings.

7. Uranus: An ice giant planet.

8. Neptune: The outermost planet in our solar system.

9. Pluto: A dwarf planet located in the Kuiper belt.

Keep in mind that planetary distances change constantly as they orbit the Sun. This list is based on average distances.