Gliese 581d
Gliese 581 D was one of Earth's first colonies settled after Earth's population had been evacuated. The planet that supported the colony was 20 light-years from Earth and had twin suns.
When Bill asked the Twelfth Doctor travel to the future with her, he took Bill to Gliese. (TV: Smile)
Landscape
Gliese was very similar to Earth. Its sky was blue. However, it had two suns, indicating it was part of a binary star system. It had seas of water and an atmosphere that made it habitable for humans. The city that would serve as the home of the colonists was surrounded by vast fields of wheat. The architecture of the city was made up of futuristic and smoothly designed buildings with many windows and an overall white color. It has numerous plants and bodies of water flowing through the streets in order to make the place a utopia. The entire city was made up of Vardis and equipped with a sizeable quantity of Emoji bots that carried out maintenance and acted as an interface between the human colonists and the Vardis.
Technology
The colonists that populated Gliese had made a number of technological advancements that participated in the functionning of the colony.
The entire city was made up of Vardis, nanobots that interlocked in order to create solid and complete structures such as the buildings and the machines. They could easily break apart into swarms and attack anyone they percieved as a threat. They would envelop the target and could strip them of clothing and fleshin seconds, leaving nothing but bones behind.
