Tellar or Tellar Prime was a Class M planet that was home to the humanoid Tellarites.
Relative to the planetoid Babel, it was located on the far side of the Andorian Empire.
Good arguments were considered a sport on Tellar.
In 2155, it became one of the founding members of the Coalition of Planets and later, in 2161, the United Federation of Planets.
Following the fall of Betazed during the Dominion War, in 2374, it was believed that Tellar could be the Dominion's next target.