The collision between the Milky Way and Andromeda

  title={The collision between the Milky Way and Andromeda},
  author={Trevor J. Cox and Abraham Loeb},
  journal={Monthly Notices of the Royal Astronomical Society},
  • T. Cox, A. Loeb
  • Published 8 May 2007
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We use a N{body/hydrodynamic simulation to forecast the future encounter between the Milky Way and the Andromeda galaxies, given current observational constraints on their relative distance, relative velocity, and masses. Allowing for a comparable amount of difiuse mass to flll the volume of the Local Group, we flnd that the two galaxies are likely to collide in a few billion years - within the Sun’s lifetime. During the flrst close encounter of the two galaxies, there is a 12% chance that the… 
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