By the current count of astronomers, our solar system includes 8 planets
and 5 dwarf planets
. The planets were formed during the process of solar system formation
, when clumps began to form in the disk of gas and dusk rotating about our young Sun. Eventually, only the planets and other small bodies in the solar system remained. The four rocky planets at the center of the solar system Mercury
, are known as the inner planets. Jupiter
, and Neptune
are all composed primarily of gas and are known as the outer planets. Find out more about the planets through the links below.