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Cosmic Interactions
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Cosmic Interactions

January 22, 2008
Colour-composite image of the triplet of galaxies, catalogued as NGC 7173 (top), 7174 (bottom right) and 7176 (bottom left), and located 106 million light-years away towards the constellation of Piscis Austrinus (the 'Southern Fish'). The image is based on data obtained with the FORS1 instrument on ESO's Very Large Telescope through three different filters, B, V, and R. NGC 7173 and 7176 are elliptical galaxies, while NGC 7174 is a spiral galaxy with quite disturbed dust lanes and a long, twisted tail. This seems to indicate that the two lower galaxies - whose combined shape bears some resemblance to that of a sleeping baby - are currently interacting. Astronomers have suggested that the three galaxies will finally merge. The data were extracted from the ESO Science Acrhive and fully processed by Henri Boffin (ESO).


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