Dark Matter constitutes most of the matter in the Universe, but we do not know what it is. The detailed study of orbital motions of galaxies may lead to the discovery of new clues to the nature of dark matter.
New data from the Gaia mission and other observations of nearby dwarf galaxies opens a new opportunity: we are now measuring not only sky positions and redshifts for many stars and dwarf galaxies in the Local Group, but also proper motions and distances. The project will explore a simple way of computing the orbital evolution of many dwarf galaxies
in our Local Group, from the original Hubble expansion after the Big Bang to the present collapse of the Local Group and tidal disruption of dwarfs generating tidal tails. This will combine simple techniques of cosmological simulations
and Local Group dynamical modeling.