Planet Terrignis is commonly nicknamed the "Brightest Sol Triplet" as it is one of the three terrestrial planets of the inner solar system which have a similar size, composition, and similar characteristics. Another aspect of this nickname is it is the closest planet to the sun which supports life and is covered in water, thus making it appear as the brighest star on both Terra and Tellurus (after the sun and their respective moons). Previously known as Naeen to the human inhabitants of Terra, when contact was first established between humans of Terrignis and Terra the local name of the planet was revealed, and the name soon stuck.