The atmosphere on earth reflects back the sun's light. Thus, the earth does not absorb harmful sun rays or UV rays emitted by the sun. Therefore, the temperature on earth remains bearable, unlike other planets.
The Sun is so large and has powerful gravity, which attracts all other objects in the solar system. It is at the center of the universe, but its size and gravity is responsible for attracting other objects, rather than its location. Sun does not have any magnetic pull and neither do planets exert a magnetic pull on Sun.