Group of galaxies

Group of galaxies

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Caption: Group of galaxies. Gemini Multi-Object Spectro- graph (GMOS) image of the Hickson Compact Group 87 (HCG 87). The galaxies seen are: edge-on spiral HCG 87a (lower left), the bright elliptical galaxy HCG 87b (lower right), the spiral HCG 87c (upper centre) and the smaller spiral HCG 87d (centre). HCG 87d is more distant than the other galaxies and is not thought to be part of the group. The other galaxies are linked by mutual gravitational attraction, which has distorted their shapes. The cluster lies about 400 million light years from Earth in the constellation Capricornus.

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Keywords: 87a, 87b, 87c, 87d, astronomy, astrophysics, capricornus, cluster, cosmology, cosmos, edge-on, elliptical, galactic, galaxies, galaxy, gemini multi-object, gmos, gmos-s, group, hcg, hcg-87, hickson compact group 87, science, space, spectrograph, spiral, spirals, universe

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