* Gravity: The sun's immense gravity holds all the planets in orbit around it. This is the fundamental reason they are part of our solar system.
* Light and Heat: The sun is the primary source of light and heat for all planets. The amount of sunlight each planet receives depends on its distance from the sun.
* Energy: Sunlight provides the energy for life on Earth, and it also drives weather patterns and other phenomena on all planets.
* Evolution: The sun's evolution (and eventual death) will ultimately affect the fate of all the planets in the solar system.
So, in short, the sun is the center of our solar system and has a profound impact on every planet within it.