Here's why:
* Definition of a satellite: A satellite is an object that orbits a larger object.
* Planets and the Sun: Planets orbit the Sun due to its immense gravity. The Sun is a star, not a planet.
* Natural vs. Artificial Satellites: We often think of satellites as the artificial objects we launch into space (like the International Space Station). However, "natural satellites" exist, such as moons orbiting planets.
Therefore, planets are not satellites of the Sun, but rather they are celestial objects that orbit the Sun in their own independent orbits.