The Variety of Solutions for Dynamics in the Local Group
  This exploration of solutions for the orbits of Local Group galaxies under
the cosmological initial condition of growing peculiar velocities and fitted to
measured distances, redshifts, and proper motions reveals a considerable
variety of histories allowed by present constraints. The solutions also point
to computations and measurements at the current level of precision that may
lead to a more accurate picture of Local Group dynamics, or perhaps point to
adjustments of our simple picture of the arrangement of mass within the Local
Group.
