What is a group of Planets called?

A group of planets is commonly called a Wheel. Other collective nouns you may see include Belt and Range.

Collective nouns are singular words used to describe groups of people, animals, or objects. When we talk about planets, which are celestial bodies inhabiting our solar system, there isn't a specific collective noun assigned to them. However, we can invent one to convey the notion of a gathering or a family of planets. Considering the way planets orbit the sun in a vast and harmonious dance, we could describe them as a "congregation" of planets. This word evokes a sense of unity, collaboration, and shared purpose—an image that aligns with the way planets interact within our solar system. Imagining our solar system as a cosmic community, one might refer to a gathering of planets as a "solar assembly." This term emphasizes the concept of unity, implying that each planet plays a vital role in a larger system. Another option could be using the term "stellar roster" to depict a collection of planets. Drawing inspiration from the celestial brightness of stars and the idea of being organized and accounted for, this collective noun not only gives the impression of a group but also suggests a structured or categorized list of planets. Ultimately, as no official collective noun for planets currently exists, the choice lies in the realm of creativity. These suggested terms simply offer imaginative ways to describe and personify the grouping of planets, illustrating their interconnectedness and mutual existence within the unique solar system we call home.