A recent study conducted by astronomers at the University of Arizona has found unusual “tidal tails” in the galaxy pair Arp 147. Tidal tails are long structures composed of gas and dust that are formed when two galaxies interact with each other either through a collision or gravitational pull. The astronomers used the Large Binocular Telescope in Arizona to observe the two galaxies and were able to detect the tidal tails in the form of two long arcs of gas and dust extending from the two galaxies. This is the first time tidal tails have been found in Arp 147 and the study provides insight into how galaxies interact with each other and evolve over time.

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source: Phys.org