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M33 Triangulum galaxy

The M33 galaxy (also known as the Triangulum Galaxy or NGC 598) is one of the closest spiral galaxies to us and the third largest galaxy in the Local Group, after Andromeda galaxy (M31) and the Milky Way. It is one of the closest spiral galaxies to us and is visible even with amateur telescopes and, in very dark skies, with the naked eye. However, because the core of this galaxy has less contrast, it is a significantly more difficult object for visual observation than many other bright galaxies and nebulae. M33 contains one of the largest known star-forming regions, NGC 604, which is about 1,500 light-years across.

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Exposure: 118x600" LRGB (almost 20 hours of integration)

Telescope: TS ONTC 10" f/4 (f/3.4 with corrector)

Camera: ZWO ASI2600MM

Mount: iOptron HAE43C

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Uploaded on October 5, 2025