* They are all celestial bodies. This means they are objects in space, not on Earth.

* They are all made up of matter. Even though they are vastly different in size and composition, they are all made of atoms.

* They are all subject to gravity. Gravity pulls them together, which is why the Moon orbits the Earth and the Earth orbits the Sun.

* They are all constantly moving. The Earth rotates on its axis, revolves around the Sun, and is also moving with the Sun in our galaxy. The Moon orbits the Earth, and the Sun is moving through the Milky Way.

* They all emit light. While the Sun is the primary source of light in our solar system, the Earth reflects sunlight and the Moon reflects sunlight from the Earth.

Let me know if you'd like to explore any of these points in more detail!