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Octopus Superior

Octopus Superior

Smaller satellite galaxies caught by a spiral galaxy are distorted into elongated structures consisting of stars, which are known as tidal streams, as shown in this artist's impression. The new survey has, for the first time, shown the presence of such tell-tale traces of spiral galaxies swallowing smaller satellites for galaxies more distant than our own “Local Group” of galaxies. Image: Jon Lomberg in collaboration with David Martinez-Delgado for the Stellar Tidal Stream Survey

Smaller satellite galaxies caught by a spiral galaxy are distorted into elongated structures consisting of stars, which are known as tidal streams, as shown in this artist's impression. The new survey has, for the first time, shown the presence of such tell-tale traces of spiral galaxies swallowing smaller satellites for galaxies more distant than our own “Local Group” of galaxies. Image: Jon Lomberg in collaboration with David Martinez-Delgado for the Stellar Tidal Stream Survey

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