Our solar system has a central star the sun. It is a monster; in fact it makes up 98% of the matter in our solar system. The gravity created by the large body exerts itself on the 8 planets that rotate around it in orbits. The solar system is thought to have formed 4.6 billion years ago. The closer a planet is to the sun, the hotter the average surface temperature on that planet. Each planet has a bit of personality itself. The solar system also has piles of rocks floating around in the form of meteoroids. There are also a little bit of sparkle going on across the solar system in the form of comets.
You will find a lot of work on planets, the sun and our moon (Luna). As the sheets progress we look at space exploration.