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Picture of the Day

Images Capture 'Stealth Merger' Of Dwarf Galaxies

The dwarf galaxy NGC 4449 is the first dwarf galaxy with an identified stellar stream (faintly seen at the upper right, and resolved into red giant stars). The star stream represents the remains of a smaller satellite galaxy merging with NGC 4449.

Visit Website | Image credit: R. Jay Gabany (Black Bird Obs.)