👉 Stellation, also known as a star cluster or galaxy cluster, is an astronomical object consisting of many stars that are arranged in a spherical shape. These stars can be very close together, forming a large, visible group of stars that can be difficult to identify on their own. Stellations are the most well-known and recognizable type of stellation, which consist of a series of concentric rings or clusters of stars that are closely spaced apart from each other.