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The growth and composition of Earth is a direct consequence of planet formation throughout the Solar System. We discuss the known history of the Solar System, the proposed stages of growth and how the early stages of planet formation may be…

Earth and Planetary Astrophysics · Physics 2015-11-25 Seth A. Jacobson , Kevin J. Walsh

The past decade has seen major progress in our understanding of terrestrial planet formation. Yet key questions remain. In this review we first address the growth of 100 km-scale planetesimals as a consequence of dust coagulation and…

Earth and Planetary Astrophysics · Physics 2018-12-05 Andre Izidoro , Sean N. Raymond

The formation of planets is one of the major unsolved problems in modern astrophysics. Planets are believed to form out of the material in circumstellar disks known to exist around young stars, and which are a by-product of the star…

Solar and Stellar Astrophysics · Physics 2009-02-17 R. Millan-Gabet , John D. Monnier

The final "giant-impact" phase of terrestrial planet formation is believed to begin with a large number of planetary "embryos" on nearly circular, coplanar orbits. Mutual gravitational interactions gradually excite their eccentricities…

Earth and Planetary Astrophysics · Physics 2015-07-15 Scott Tremaine

Transiting circumbinary planets discovered by Kepler provide unique insight into binary star and planet formation. Several features of this new found population, for example the apparent pile-up of planets near the innermost stable orbit,…

Earth and Planetary Astrophysics · Physics 2016-06-15 Rachel A. Smullen , Kaitlin M. Kratter , Andrew Shannon

The terrestrial planets formed by accretion of asteroid-like objects within the inner solar system's protoplanetary disk. Previous works have found that forming a small-mass Mars requires the disk to contain little mass beyond ~1.5 au…

Earth and Planetary Astrophysics · Physics 2023-06-16 Patryk Sofia Lykawka , Takashi Ito

We review the state of the field of terrestrial planet formation with the goal of understanding the formation of the inner Solar System and low-mass exoplanets. We review the dynamics and timescales of accretion from planetesimals to…

Earth and Planetary Astrophysics · Physics 2015-06-18 Sean N. Raymond , Eiichiro Kokubo , Alessandro Morbidelli , Ryuji Morishima , Kevin J. Walsh

The process of forming a circumbinary planet is thought to be intimately related to the structure of the nascent circumbinary disc. It has been shown that the structure of a circumbinary disc depends strongly on 3-dimensional effects and on…

Earth and Planetary Astrophysics · Physics 2024-03-08 Arnaud Pierens , Richard P. Nelson

We reconsider the commonly held assumption that warm debris disks are tracers of terrestrial planet formation. The high occurrence rate inferred for Earth-mass planets around mature solar-type stars based on exoplanet surveys (roughly 20%)…

Earth and Planetary Astrophysics · Physics 2017-02-22 Scott J. Kenyon , Joan R. Najita , Benjamin C. Bromley

Detections of planets in eccentric, close (separations of ~20 AU) binary systems such as \alpha Cen or \gamma Cep provide an important test of planet formation theories. Gravitational perturbations from the companion are expected to excite…

Earth and Planetary Astrophysics · Physics 2016-08-31 Kedron Silsbee , Roman R. Rafikov

Recent results have shown that many of the known extrasolar planetary systems contain regions which are stable for both Earth-mass and Saturn-mass planets. Here we simulate the formation of terrestrial planets in four planetary systems --…

Astrophysics · Physics 2009-11-10 Sean N. Raymond , Rory Barnes , Nathan A. Kaib

Circumbinary planetary systems recently discovered by Kepler represent an important testbed for planet formation theories. Planetesimal growth in disks around binaries has been expected to be inhibited interior to ~10 AU by secular…

Earth and Planetary Astrophysics · Physics 2017-01-04 Roman R. Rafikov

Compact binaries with orbital periods shorter than about 7 days show an absence of transiting planets, a feature known as the ``circumbinary planet desert". The physical mechanism behind this desert remains unclear. We investigate its…

Earth and Planetary Astrophysics · Physics 2026-05-06 Bin Liu , Dong Lai

We investigate the formation of terrestrial planets in the late stage of planetary formation using two-planet model. At that time, the protostar has formed for about 3 Myr and the gas disk has dissipated. In the model, the perturbations…

Earth and Planetary Astrophysics · Physics 2010-04-09 Ji Jianghui , Zhang Niu

Super-Earths are found in tighter orbits than the Earth's around more than one third of main sequence stars. It has been proposed that super-Earths are scaled-up terrestrial planets that formed similarly, through mutual accretion of…

Earth and Planetary Astrophysics · Physics 2019-07-10 Michiel Lambrechts , Alessandro Morbidelli , Seth A. Jacobson , Anders Johansen , Bertram Bitsch , Andre Izidoro , Sean N. Raymond

Hostile tidal forces may inhibit the formation of Jovian planets in binaries with semimajor axes of $\la$$50\au$, binaries that might be called ``close'' in this context. As an alternative to in situ planet formation, a binary can acquire a…

Astrophysics · Physics 2008-11-26 Eric Pfahl , Matthew Muterspaugh

I examine the standard model of planet formation, including pebble accretion, using numerical simulations. Planetary embryos large enough to become giant planets do not form beyond the ice line within a typical disk lifetime unless icy…

Earth and Planetary Astrophysics · Physics 2016-07-06 J. E. Chambers

Recent direct imaging discoveries suggest a new class of massive, distant planets around A stars. These widely separated giants have been interpreted as signs of planet formation driven by gravitational instability, but the viability of…

Earth and Planetary Astrophysics · Physics 2014-11-20 Kaitlin M. Kratter , Ruth A. Murray-Clay , Andrew N. Youdin

Thousands of confirmed and candidate exoplanets have been identified in recent years. Consequently, theoretical research on the formation and dynamical evolution of planetary systems has seen a boost, and the processes of planet-planet…

Earth and Planetary Astrophysics · Physics 2016-09-06 M. B. N. Kouwenhoven , Qi Shu , Maxwell Xu Cai , Rainer Spurzem

The dominant accretion process leading to the formation of the terrestrial planets of the Solar System is a subject of intense scientific debate. Two radically different scenarios have been proposed. The classic scenario starts from a disk…

Earth and Planetary Astrophysics · Physics 2024-11-15 Alessandro Morbidelli , Thorsten Kleine , Francis Nimmo
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