Changes

[[Gerard P. Kuiper]], in 1951, postulated, from the [[nebula hypothesis]], that the original accretion disk out of which the planets formed left a remnant, beyond 30 AU, of bodies that could not fully coalesce.<ref name=Gomes/> Different [[astronomy|astronomers]] have proposed two models to explain what happened next to some of these bodies:

[[Gerard P. Kuiper]], in 1951, postulated, from the [[nebula hypothesis]], that the original accretion disk out of which the planets formed left a remnant, beyond 30 AU, of bodies that could not fully coalesce.<ref name=Gomes/> Different [[astronomy|astronomers]] have proposed two models to explain what happened next to some of these bodies:

# [[Neptune]], [[Uranus]], and [[Saturn]] migrated outward to their present orbits, while [[Jupiter]] migrated inward. As Neptune approached 30 AU, its migration slowed to a stop. During this migration, certain bodies passed close to it and then flew away on random paths.<ref name=Gomes/><ref name=Hahn>Hahn, J.M., and Malhotra, R. "Neptune's Migration into a Stirred-Up Kuiper Belt: A Detailed Comparison of Simulations to Observations." ''Astron. J. '' 130:2392-2414, November 2005. {{arXiv|astro-ph/0507319}} Accessed June 23, 2008.</ref>

# [[Neptune]], [[Uranus]], and [[Saturn]] migrated outward to their present orbits, while [[Jupiter]] migrated inward. As Neptune approached 30 AU, its migration slowed to a stop. During this migration, certain bodies passed close to it and then flew away on random paths.<ref name=Gomes/><ref name=Hahn>Hahn, J.M., and Malhotra, R. "Neptune's Migration into a Stirred-Up Kuiper Belt: A Detailed Comparison of Simulations to Observations." ''Astron. J. '' 130:2392-2414, November 2005. {{arXiv|astro-ph/0507319}} Accessed June 23, 2008.</ref>

# SDOs came originally from the [[Kuiper belt]], from which any of them might have escaped following a gravitational interaction with Neptune, an encounter with a Kuiper Belt Object (KBO) 500 km or more in radius, or a collision.<ref name=Gomes/>

# SDOs came originally from the [[Kuiper belt]], from which any of them might have escaped following a gravitational interaction with Neptune, an encounter with a Kuiper Belt Object (KBO) 500&nbsp;km or more in radius, or a collision.<ref name=Gomes/>

== Detached Scattered Disk Objects ==

== Detached Scattered Disk Objects ==