Neptune's formation

before neptune becomes a planet there must be a nebula and then later on there is accretion which in this case the planet begins to come together and then the gravitational pull forces the particles to come together. and it size increases. it is then able to keep its neighborhood clear and is able to take objects with it's gravitational pull.

pluto is not a planet because it does not have enough gravitational pull to control objects. and my body, neptune is a planet because it orbits the sun enough gravitational pull to control objects and clear its neighborhood. and is also spherical.

neptune's diameter is 49,528 kms and the diameter of neptune is 3.9 times the diameter of earth.