How were the planets formed?

After the gaseous cloud called the
solar nebula collapsed upon itself due to
the strength of its own gravity and formed
the Sun, the dust and particles around it
clumped together to form the planets.
The heat of the Sun melted the ice particles
nearby and eventually these rocks grew larger
to form the four rocky planets. Some ice
particles were too far away from the Sun to be
melted. These ice pieces combined with gases
to form the planets called the gas giants.