Differences and similarities of nebular theory, encounter theory and proto planet theory?

All these theories, the nebular theory, the encounter theory and the planet theory explain phenomena in the Solar System.

According the nebular theory the planets originate in a dense disk formed from material in the gas and dust cloud that collapses to give us the Sun

The encounter theory is o ne of the earliest theories for the formation of the planets. According to this theory planets are formed from material ejected from the Sun or a companion star during an encounter with another object.

Proto planet theory is the current working model for the formation of the Solar System. According to this planet theory a dense interstellar cloud produces a cluster of stars.