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Hubble captures two galaxies mid-merger in Arp 55

Original: Hubble image of Arp 55, also known as UGC 4881. This pair of galaxies is about halfway through a merger. Their cores are

A new Hubble Space Telescope image of Arp 55, also known as UGC 4881, shows a pair of galaxies roughly halfway through a merger. Their cores remain distinct while their disks already overlap, and a bright curved tail dotted with young blue star clusters sweeps around the pair, a signature of the ongoing collision.

Why now: Striking new Hubble imagery of interacting galaxies routinely draws wide public interest in space science.

Hubble Space TelescopeArp 55UGC 4881

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Evidence

• Hubble image of Arp 55, also known as UGC 4881. This pair of galaxies is about halfway through a merger. Their cores are separate, but their disks are overlapping. The bright tail that curves around the bottom of the galaxies is dotted with young, blue star clusters, likely the… · ArpBot · 3

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