A hit-and-run giant impact scenario

  title={A hit-and-run giant impact scenario},
  author={Andreas Reufer and Matthias M. M. Meier and W. Benz and Rainer Wieler},
Signatures of Hit-and-run Collisions
Terrestrial planets grew in a series of similar-sized collisions that swept up most of the next-largest bodies. Theia was accreted by the Earth to form the Moon according to the theory. Planetesimals
A multiple-impact origin for the Moon
The hypothesis of lunar origin by a single giant impact can explain some aspects of the Earth–Moon system. However, it is difficult to reconcile giant-impact models with the compositional similarity
Origin of the Earth and Moon
According to the giant impact hypothesis, the Moon formed from a disk created by an impact between the proto-Earth and an impactor. Three major models for this hypothesis are (a) standard model: a
N-Body Simulation of the Formation of the Earth-Moon System from a Single Giant Impact
The giant impact hypothesis is the dominant theory of how the Earth-Moon system was formed. Models have been created that can produce a disk of debris with the proper mass and composition to create
Constraints on the pre-impact orbits of Solar system giant impactors
We provide a fast method for computing constraints on impactor pre-impact orbits, applying this to the late giant impacts in the Solar System. These constraints can be used to make quick, broad
A Magnetized, Moon-forming Giant Impact
The Moon is believed to have formed in the aftermath of a giant impact between a planetary-mass body and the proto-Earth. In a typical giant impact scenario, a disk of vapor, liquid, and solid debris
Can a jumping-Jupiter trigger the Moon’s formation impact?
We investigate the possibility that the Moon’s formation impact was triggered by an early dynamical instability of the giant planets. We consider the well-studied “jumping Jupiter” hypothesis for the
Lunar-forming impacts: processes and alternatives
  • R. Canup
  • Physics, Geology
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
The formation of a protolunar disc by a giant impact with the early Earth is discussed, focusing on two classes of impacts: canonical impacts and high-angular-momentum impacts, both of which require subsequent processes for consistency with the current Earth and Moon.


Hit-and-run planetary collisions
It is shown that colliding planets do not simply merge, as is commonly assumed, and in many cases, the smaller planet escapes from the collision highly deformed, spun up, depressurized from equilibrium, stripped of its outer layers, and sometimes pulled apart into a chain of diverse objects.
Origin of the Moon in a giant impact near the end of the Earth's formation
This work reports a class of impacts that yield an iron-poor Moon, as well as the current masses and angular momentum of the Earth–Moon system, and suggests that the Moon formed near the very end of Earth's accumulation.
Evolution of a Circumterrestrial Disk and Formation of a Single Moon
Abstract We investigate the evolution of a circumterrestrial disk of debris generated by a giant impact on Earth and the dynamical characteristics of the moon accreted from the disk by using
A Scaling Relationship for Satellite-Forming Impacts
Abstract We describe a scaling relationship that can be used to characterize the results of numerical smooth particle hydrodynamic (SPH) experiments of potential satellite-forming impacts. The
Oxygen Isotopes and the Moon-Forming Giant Impact
The three oxygen isotopes (Δ17O), 16O,17O, and 18O provide no evidence that isotopic heterogeneity on the Moon was created by lunar impacts, and are consistent with the Giant Impact model.
Formation of Protoplanets from Planetesimals in the Solar Nebula
Planetary accretion from planetesimals to protoplanets is investigated using three-dimensional N-body simulations. The effect of gas drag due to solar nebula is included and realistic-sized