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The Milky Way galaxy, perturbed by the tidal interaction with a dwarf galaxy, as predicted by N-body simulations. The locations of the observed stars above and below the disk, which are used to test the perturbation scenario, are indicated.

Stars around the milky way: Cosmic space invaders or victims of galactic eviction?

Scientists at the Max Planck Institute for Astronomy (MPIA) have recently investigated the origin of groups of stars around the Milky Way galaxy. These halo stars are...

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