Where Did the Moon Come From?

  title={Where Did the Moon Come From?},
  author={Edward Belbruno and J. Richard Gott III},
  journal={The Astronomical Journal},
  pages={1724 - 1745}
The current standard theory of the origin of the Moon is that Earth was hit by a giant impactor the size of Mars, causing ejection of iron-poor impactor mantle debris that coalesced to form the Moon. But where did this Mars-sized impactor come from? Isotopic evidence suggests that it came from 1 AU radius in the solar nebula, and computer simulations are consistent with its approaching Earth on a zero-energy parabolic trajectory. But how could such a large object form in the disk of… 
Forming a Moon with an Earth-like Composition via a Giant Impact
Computer simulations show that a giant impact on early Earth could lead to a Moon with a composition similar to Earth’s, and simulate impacts involving larger impactors than previously considered that can produce a disk with the same composition as the planet's mantle, consistent with Earth-Moon compositional similarities.
Life on Earth Came From Other Planets by Rhawn Joseph
  • Physics, Geology
  • 2010
A comprehensive theory based on a review of scienti fic findings published in prestigious scientific journals, is presented to ex plain how life on Earth came from other planets. Life appeared a few
Chemical and isotopic consequences of lunar formation via giant impact
There is near consensus in the planetary science community that the origin of the Moon can be traced to a massive interplanetary collision between a roughly Mars-sized object and the growing Earth
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.
Origin of the Moon
The Earth-Moon system is unusual in several respects. The Moon is roughly 1/4 the radius of the Earth - a larger satellite-to-planet size ratio than all known satellites other than Pluto's Charon.
Capture of interplanetary bodies in geocentric orbits and early lunar evolution
During the accretion of planets such as Earth, which are formed by collisional accretion of plan-etesimals, the probability of capture of interplanetary bodies in planetocentric orbits is calculated
New approaches to the Moon's isotopic crisis
  • H. Melosh
  • Geology, Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
The isotopic constraint may be the most stringent test yet for theories of the Moon's origin, as it differs from the Earth's in its low volatile content and perhaps in the elevated abundance of oxidized iron.
The leading theory for the formation of Earth’s Moon invokes a collision between a Mars-sized body and the proto-Earth to produce a disk of orbiting material that later condenses to form the Moon. We


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.
From interstellar gas to the Earth‐Moon system
Abstract— This paper reports the current status of my smoothed particle hydrodynamic (SPH) simulations of the formation of the Moon. Since the Moon has recently been found to have been formed
Origin of Terrestrial Planets and-the Earth-Moon System
our solar system was established more than 4 billion years ago through an era of planet formation lasting from 10 million to several hundred millions of years. Before we began learning about other
Origin of the Moon-The Collision Hypothesis
In 1871, during his presidential address to the British Association in Edinburgh, Sir William Thompson (later Lord Kelvin) discussed the impact of two Earth-like bodies, asserting that "when two
Simulations of a late lunar-forming impact
The formation of planetesimals.
Four stages in the accretion of planetesimals are described. The initial stage is the condensation of dust particles from the gaseous solar nebula as it cools. These dust particles settle into a thin
Earth, Moon and Planets
THIS is one of a series of books from Harvard Observatory, all of which are compiled by specialists in their own particular sphere. The present volume gives up-to-date information about the bodies in
Migration of Jupiter‐Family Comets and Resonant Asteroids to Near‐Earth Space
Abstract: The orbital evolution of about 26,000 Jupiter‐crossing objects and 1,500 resonant asteroids under the gravitationa influence of planets was investigated. The rate of their collisions with
Dynamical evolution of Jupiter's Trojan asteroids
TROJAN asteroids, which may outnumber the asteroids in the asteriod belt, are objects that orbit the Sun with the same mean semi-major axis as Jupiter, but lead or trail the position of Jupiter in