Messier 37, or M37, is an open star cluster located in the constellation Auriga, about 4,500 light-years from Earth. It is the richest and brightest of the three prominent open clusters in Auriga (M36, M37, and M38), containing around 500 stars, many of which are relatively young and shine with a yellowish hue. M37 is estimated to be about 300 million years old and spans roughly 25 light-years in diameter. With a visual magnitude of 6.2, it is visible through binoculars in dark skies as a faint, hazy patch, while telescopes reveal it as a beautiful and densely packed cluster of stars. M37 is a popular target for amateur astronomers due to its brightness and distinct appearance among open clusters.
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