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Our current knowledge of the dynamical structure of the Kuiper Belt is reviewed here. Numerical results on long term orbital evolution and dynamical mechanisms underlying the transport of objects out of the Kuiper Belt are discussed.…

Astrophysics · Physics 2007-05-23 R. Malhotra , M. Duncan , H. Levison

We review the current state of knowledge of the long-term evolution of the small bodies that give rise to comets and exocomets, as well as their reservoirs. The active cometary phase is only transitory, and bodies that become comets pass…

The Oort Cloud, the Kuiper Belt and the Scattered Disk are dynamically distinct populations of small bodies evolving in the outer regions of the Solar System. Whereas their collisional activity is now quiet, gravitational interactions with…

Astrophysics · Physics 2009-03-19 S. Charnoz A. Morbidelli

The Oort cloud and the scattered disk are the two primary reservoirs for long-period and short-period comets, respectively. In this review, we assess the known observational constraints on these reservoirs' properties and their formation.…

Earth and Planetary Astrophysics · Physics 2022-06-02 Nathan A. Kaib , Kathryn Volk

This chapter discusses the dynamical properties of the Kuiper belt population. Then, it focuses on the characteristics of the Kuiper belt that cannot be explained by its evolution in the framework of the current solar system. We review…

Astrophysics · Physics 2007-05-23 A. Morbidelli , H. F. Levison , R. Gomes

The Edgeworth-Kuiper belt encodes the dynamical history of the outer solar system. Kuiper belt objects (KBOs) bear witness to coagulation physics, the evolution of planetary orbits, and external perturbations from the solar neighborhood. We…

Astrophysics · Physics 2007-05-23 E. Chiang , Y. Lithwick , R. Murray-Clay , M. Buie , W. Grundy , M. Holman

The existence of the Oort Comet Cloud, the Kuiper Belt, and plausible inefficiencies in planetary core formation, all suggest that there was once a residual planetesimal disk of mass 10-100 Earth-masses in the vicinity of the giant planets…

Astrophysics · Physics 2009-10-31 Joseph M. Hahn , Renu Malhotra

A numerical simulation of the Oort cloud is used to explain the observed orbital distributions and numbers of Jupiter-family and Halley-type short-period comets. Comets are given initial orbits with perihelion distances between 5 and 36 AU,…

Earth and Planetary Astrophysics · Physics 2014-02-07 V. V. Emel'yanenko , D. J. Asher , M. E. Bailey

We explore the origin and orbital evolution of the Kuiper belt in the framework of a recent model of the dynamical evolution of the giant planets, sometimes known as the Nice model. This model is characterized by a short, but violent,…

Questions regarding how primordial or pristine the comets of the solar system are have been an ongoing controversy. In this review, we describe comets' physical evolution from dust and ice grains in the solar nebula to the contemporary…

Earth and Planetary Astrophysics · Physics 2022-07-27 Jürgen Blum , Dorothea Bischoff , Bastian Gundlach

We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets that remain bound to the Solar system…

Earth and Planetary Astrophysics · Physics 2019-05-01 David Vokrouhlický , David Nesvorný , Luke Dones

Comets are classified from their orbital characteristics into two separate classes: nearly-isotropic, mainly long-period comets and ecliptic, short-period comets. Members from the former class are coming from the Oort cloud. Those of the…

Astrophysics · Physics 2013-02-06 J. Crovisier

The origin of the highly eccentric, inclined, and resonance-locked orbit of Pluto has long been a puzzle. A possible explanation has been proposed recently [Malhotra, R., {\it Nature} 365:819-21 (1993)] which suggests that these…

Astrophysics · Physics 2009-10-28 Renu Malhotra

The data obtained in the recent Rosetta space mission to comet 67P/Churyumov-Gerasimenko have had a profound impact on the understanding of the nature of comets. In addition to revising the notions on the physical properties and structure…

Earth and Planetary Astrophysics · Physics 2019-12-24 V. V. Emel'yanenko

We explore the long-term evolution of a bias-free orbital representation of the cometary nuclei (with diameters above 2 km) of the Kuiper belt, using the so-called L7 synthetic model from CFEPS, which consists of three dynamical…

Earth and Planetary Astrophysics · Physics 2019-10-23 Marco A. Muñoz-Gutiérrez , Antonio Peimbert , Bárbara Pichardo , Matthew J. Lehner , Shiang-Yu Wang

This chapter reviews accretion models for Kuiper belt objects (KBOs), discussing in particular the compatibility of the observed properties of the KBO population with the streaming instability paradigm. Then it discusses how the dynamical…

Earth and Planetary Astrophysics · Physics 2020-01-22 Alessandro Morbidelli , David Nesvorny

Past and future dynamical evolution of all 64 long period comets having 1/aori< 1\times10-4 au-1 and qosc > 3.0 au and discovered after 1970 is studied. For all of them we obtained a new, homogeneous set of osculating orbits, including 15…

Earth and Planetary Astrophysics · Physics 2015-05-27 Piotr A. Dybczyński , Małgorzata Królikowska

In this chapter, we review the processes involved in the formation of planetesimals and comets. We will start with a description of the physics of dust grain growth and how this is mediated by gas-dust interactions in planet-forming disks.…

Earth and Planetary Astrophysics · Physics 2022-12-12 Jacob B. Simon , Jürgen Blum , Til Birnstiel , David Nesvorný

Our understanding of the history of the solar system has undergone a revolution in recent years, owing to new theoretical insights into the origin of Pluto and the discovery of the Kuiper belt and its rich dynamical structure. The emerging…

Earth and Planetary Astrophysics · Physics 2019-12-03 Renu Malhotra

We study the evolution of long-period comets by numerical integration of their orbits, following comets from their origin in the Oort cloud until their final escape or destruction, in a model solar system consisting of the Sun, the four…

Astrophysics · Physics 2007-05-23 Paul Wiegert , Scott Tremaine
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