Messier (M) 37 is the brightest and richest open cluster in the constellation Auriga at a distance of 4.500 light-years. It was discovered by the Italian astronomer Giovanni Battista Hodierna before 1654. M37 is located opposite from the Galactic Center as seen from Earth, so is in one of the nearby outer arms. Estimates of its age range from 347 million to 550 million years. It has 1.500 times the mass of the Sun and contains over 500 identified stars.
Open stellar cluster M 37, 16 November 2018, Vorst, William Optics 110 mm APO FLT f/7, Canon EOS 600D, UV-IR, UHC filter, 400 ISO, 51 frames x 30 sec,1530 sec. fitswork.
Open star cluster M37, Vorst (D), 16 November 2018, William Optics 110 nn APO FLT f/7, Canon EOS 600D, UV-IR, UHC filter, 400 ISO, f = 770 mm, 1530 sec, PixInsight V 1.8.8-5