Object Analysis

Messier 35 (M35) is a large open cluster in the constellation Gemini. It was discovered by Philippe Loys de Chéseaux in 1745. It is located about 2,800 light-years from Earth and covers an area of the sky nearly as large as the full moon.

M35 is a very rich cluster, containing several hundred stars, many of which are bright blue B-type stars. It is relatively young, with an estimated age of 100 million years. In a telescope, it appears as a spectacular, dense scattering of stars that is easily visible even in moderately light-polluted skies.

A fascinating feature of M35 is the presence of a much more distant open cluster, NGC 2158, located just to its southwest. NGC 2158 is much older and about four times farther away, appearing as a compact, fuzzy patch in small telescopes, providing a beautiful sense of depth to the field of view.