Tellar is a fictional planet in the Star Trek universe, known for its diverse ecosystems and rich cultural heritage. It is the homeworld of the Tellarites, a species recognized for their argumentative nature and strong sense of community. Tellar is one of the founding members of the United Federation of Planets. The planet features a variety of landscapes, including mountains, forests, and plains, which contribute to its vibrant biodiversity. Tellarites are known for their technological advancements and contributions to interstellar diplomacy, playing a significant role in the early formation of the Federation alongside other species like the Vulcans and Humans.