The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...

Our Milky Way Galaxy is on a crash course of epic proportions: about four billion years from now, scientists predict it will collide with its neighboring Andromeda Galaxy and form a giant elliptical ...

NASA scientists have detected a massive halo of plasma surrounding the nearby Andromeda galaxy. The halo, a massive orb of influence stretching deep into space, reaches halfway to our own Milky Way ...

A newly confirmed dwarf galaxy orbiting Andromeda contains so few stars that automated detection pipelines ignored it entirely — and that invisibility may be precisely what makes it scientifically ...