Mercury as the Relic of Earth and Venus Outward Migration

  title={Mercury as the Relic of Earth and Venus Outward Migration},
  author={Matthew S. Clement and Sean N. Raymond and John E. Chambers},
  journal={The Astrophysical Journal Letters},
In spite of substantial advancements in simulating planet formation, the planet Mercury’s diminutive mass and isolated orbit and the absence of planets with shorter orbital periods in the solar system continue to befuddle numerical accretion models. Recent studies have shown that if massive embryos (or even giant planet cores) formed early in the innermost parts of the Sun’s gaseous disk, they would have migrated outward. This migration may have reshaped the surface density profile of… 

Terrestrial planet and asteroid belt formation by Jupiter-Saturn chaotic excitation

Patryk Sofia Lykawka1 & Takashi Ito (伊藤孝士)2,3 1 School of Interdisciplinary Social and Human Sciences, Kindai University, Shinkamikosaka 228-3, Higashiosaka, Osaka, 577-0813, Japan;

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The absence of planets interior to Mercury continues to puzzle terrestrial-planet formation models, particularly when contrasted with the relatively high derived occurrence rates of short-period

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No planets exist inside the orbit of Mercury and the terrestrial planets of the solar system exhibit a localized configuration. According to thermal structure calculation of protoplanetary disks, a

Mars’ growth stunted by an early giant planet instability

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It is shown that a new mode of planet formation known as “Viscous Stirred Pebble Accretion,” which has recently been shown to produce the giant planets, also naturally explains the small size of Mars and the low mass of the asteroid belt, and there is a unified model that can be used to explain all of the basic properties of the authors' solar system.

The structure of protoplanetary discs around evolving young stars

The formation of planets with gaseous envelopes takes place in protoplanetary accretion discs on time scales of several million years. Small dust particles stick to each other to form pebbles,