The two open clusters located in the constellation Gemini are M35 (NGC 2168) and NGC 2158. They appear to be next to each other, but are actually far apart. The M35, located at the upper right, is about 2,800 light-years from Earth and is a young open cluster with many bright blue stars. NGC 2158, located at the lower left, is about four times farther away than M35 and consists of older stars that emit light closer to yellow.
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