How the Oort Cloud was Formed

The Oort cloud is gravitationally bound to our Solar System and follows it's orbit around the Milky Way. So the question is how was The Oort Cloud formed?

Believe it or not there are many theories floating around about this subject and no solution that is clear cut. Some believe that the Oort Cloud was formed around the same time as the giant planets were being formed as well as using the same process. This theory was made popular by Viktor S. Safronov in 1972 in his Accretionary theory and supported also by A.G.W. Cameron with his model of the Protostar Nebula. This suggests that the Oort cloud has been around 4.6 billion years.

Protostar Nebula

Another theory that has become popular recently is that the Oort Cloud is much younger then our Solar System and that instead of being formed by a disk of dust around the Sun during the formation of the planets rather the Oort Cloud could possibly have been formed by Giant Molecular Clouds.

So with these two different opinions there is no clear cut consensus of which theory is correct, as of now anyways.

Work Cited

Delsemme, Armand. "Comets." Britannica. N.p.. Web. 5 Apr 2014. <http://www.britannica.com/EBchecked/topic/127524/comet/54352/Formation-of-the-Oort-cloud>.

 Harold F. Levison, Luke Dones, Martin J. Duncan (2001). "The Origin of Halley-Type Comets: Probing the Inner Oort Cloud. Astronomical Journal