Whirlpool Galaxy and Companion

 Whirlpool galaxy 1
Whirlpool Galaxy and Companion

The graceful, winding arms of the majestic spiral galaxy M51 (NGC 5194) appear like a grand spiral staircase sweeping through space. They are actually long lanes of stars and gas laced with dust. Some astronomers believe that the Whirlpool’s arms are so prominent because of the effects of a close encounter with NGC 5195, the small, yellowish galaxy at the outermost tip of one of the Whirlpool’s arms

Image Credit:   NASA / Hubble

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