M37 is a galactic cluster of about 150 stars
located in the constellation Auriga. It has a diameter of about
200 light-years, making it roughly twice the size as nearby M36.
At a distance of around 4,600 light-years, it is the richest and
brightest of the Auriga clusters. It is also the oldest at about
300 million years. M37 is considered to be one of the finest
open clusters in the heavens. It is easily viewed in binoculars
and small telescopes.