Why do comets come here from oort cloud?

Comets originate from the Oort Cloud, a vast, spherical region of icy bodies surrounding the solar system. They are nudged into the inner solar system by gravitational interactions with nearby stars or molecular clouds. As they approach the Sun, the heat causes their ices to vaporize, creating the characteristic glowing coma and tail. This process makes them visible from Earth and allows us to study these ancient remnants of the solar system's formation.