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M51 Spiral Galaxy .

Hubble Space Telescope

9 hours in B, V, I, and Ha

Source image from NASA, ESA, S. Beckwith, and The Hubble Heritage Team (STScI/AURA).

Nature's elegance is everywhere. The shell of the Chambered Nautilus is also a logarithmic spiral!At right is the Nautilus in theta - ln(r) space.