Page "Naked eye" Paragraph 20
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The visibility of diffuse objects such as star clusters and galaxies is much more strongly affected by light pollution than the visibility of planets and stars.
These include the Pleiades, h / χ Persei, the Andromeda galaxy, the Carina Nebula, the Orion Nebula, Omega Centauri, 47 Tucanae and the globular cluster M13 in Hercules.
The Triangulum Galaxy ( M33 ) is a difficult averted vision object and only visible at all if it is higher than 50 ° in the sky.
The globular clusters M 3 in Canes Venatici and M 92 in Hercules are also visble with the naked eye under such conditions.
The most distant objects that have been seen by the naked eye are nearby bright galaxies such as Centaurus A, Bode's Galaxy, Sculptor Galaxy, and Messier 83.
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