M67

M67 is an open star cluster located in the constellation Cancer. It is notable for its age, estimated at 4.5 billion years, making it one of the oldest known open clusters. Open clusters, unlike globular clusters, typically contain fewer stars, ranging from a dozen to hundreds, and are often arranged asymmetrically. M67 is concentrated toward the Milky Way and is part of a flattened, disk-like system. Its stars are primarily Population I, meaning they have a higher metal-to-hydrogen ratio compared to older stars.123