According to The Complete and Official Map of The Verse, the Verse is also known as 34 Tauri (2020), although it should be noted that the real 34 Tauri is not a star, but an object accidentally cataloged as a star by astronomer John Flamsteed in 1690 which was later determined to be the planet Uranus. A PDF file titled The Verse in Numbers, accompanying the map on its official website, and from which the map is based, states that in 2020 Earth astronomers discover that 34 Tauri, up until that time thought to be a single star, was actually a cluster of five stars and several brown dwarfs, and soon many Earth-sized planetary bodies are discovered. Plans to colonize the system were underway by the mid-21st century when conditions on Earth became so bad that it could no longer support human life and humanity needed to find a new home. (However, some conspiracy theorists claim that this is false. But that’s another story.)
The star system is a star cluster, of the likes of the triple star system Alpha Centauri. It consists of five main sequence stars, around which orbit an assortment of protostars, gas giants, asteroid belts, planets, and their moons. Four of the main sequence stars orbit a central star.
The system has five stars and seven brown dwarf protostars. All the stars orbit the White Sun, which is a class A0 giant, 2.5 times bigger than Sol and 80 times as bright. The “Central Planets” are the terrestrial worlds that orbit the White Sun. Farther out in this system the Red Sun and Georgia share an orbit, along with the worlds orbiting these stars, referred to as “Border Planets”. The fourth star Kalidasa and its planets orbit next. After that, the fifth and last star Blue Sun and its planets orbit. Worlds orbiting these last two stars comprise “The Rim”. Planets too far away from the biozones of the main stars are sustained for habitability by a series of protostars. The protostars Qin Shi Huang and Lux orbit the White Sun. Murphy orbits Georgia. Himinbjørg and Heinlein orbit the Red Sun, Penglai orbits Kalidasa, and Burnham orbits the Blue Sun.
The number of terraformed worlds in the system is never mentioned in the series though in a deleted scene from the episode “Our Mrs. Reynolds“, Captain Malcolm Reynolds mentions to the character Saffron that there are “more than 70 Earths spinning in this galaxy and the meek have inherited not a one.” Also, the opening narration of the film Serenity gives us a brief history of the Firefly universe and mentions; “Earth That Was could no longer sustain our numbers; we were so many. We found a new Solar system, dozens of planets and hundreds of moons.”
All the worlds that make up the ‘Verse have two names, a Sino (Chinese) name and Anglo (English) name. Sometimes, only one is used officially. This is not the case with the five main sequence stars. The Sino names of the five stars are based on the old-world concept of the Five Chinese Constellations. The Anglo names are given by the real temperature-spectral color of the sun, with the exception of two which are yellow, named Georgia and Kalidasa.