One-Armed Spiral Galaxy NGC 4725

One-Armed Spiral Galaxy NGC 4725 While most spiral galaxies, including ourown Milky Way, have two or more spiral arms, NGC 4725 has only one. In this sharp color composite image, the solospira mirabilisseems to wind from a prominent ring of bluish, newborn star clusters and red tinted star forming regions.The odd galaxy alsosports obscuring dust lanes a yellowish central bar structure composed of an older population of stars. NGC 4725 is over 100 thousand light-years across and lies 41 million light-years away in the well-groomed constellationComa Berenices. Computersimulationsof the formation of single spiral arms suggest that they can be either leading or trailing arms with respect to a galaxy'soverall rotation. Also included in the frame, sporting a noticably more traditional spiral galaxy look, is a more distant background galaxy. rNGC-4725-HaLAOXRGBpugh10241

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