Mimas, also known as Saturn I and the Death Star, is a temperate Me-Class moon of Saturn and one of the more recent in the Sol System to be terraformed. It is also the one of the smallest in the Sol System to be round from self-gravitation.
Mimas was discovered by the astronomer William Herschel on September 17. 1789. It wasn't properly visited until 1979 when Pioneer 11 flew by Saturn, its closest approach to Mimas being 104263 km on September 1, 1979. One year later, Voyager 1 flew by and Voyager 2 the next year.
Mimas was imaged several times by the Cassini orbiter, which entered into orbit around Saturn in 2004. A close flyby occurred on February 13, 2010, when Cassini passed by Mimas at 9,500 km.
The next visit wouldn't be until the Great Solar System Tour, during which humans first set foot in Herschel Crater. A research station was built in the middle of the crater to not only study the moon itself but to also serve as a base for the study of Saturn.
During the initial terraforming of the Sol System, Mimas was considered and quickly dismissed as a candidate mostly due to its low gravity being ill suited for any normal method of terraforming, as well as the technology for constructing a large sphere around the moon having not been not being feasible at the time. For the rest of the Third Age, Mimas and especially Herschel Crater was a popular tourist destination, having been domed off and kept at a temperature that would keep the ice from melting.
However, with the development of terrashaping technology, a means for safety terraform the moon was quickly devised. Small rocky Kuiper Belt objects were maneuvered into orbit and carved with powerful lasers to mimic the moon's original landscape.
The original landscapes were removed and the new landscapes lowered down. Some of the ice from the moon was melted and used for Mimas' new crater lakes while others were broken down into hydrogen and oxygen, the oxygen being used for the air and the hydrogen being used to power the lasers. In 13201 CE, a massive clear but strong dome was placed around the moon and the temperature within was warmed. Bioengineered plant and animal life was quickly introduced and the first human colonists stepped on the moon a mere twenty years later.
Due to the extremely low gravity, trees on Mimas are unimaginably tall, well over 600 foot thanks to genetic engineering and adaption. Because of how tall they are, the inhabitants of Mimas have even built their own homes within them as well as long bridges that connect some of the trees.
The native human population on Mimas have undergone millennia of genetic engineering to become similar to Ceresians, smaller in height with large wings on their backs which they use to fly around their world. The world is a popular tourist attraction, especially for the swimming, surfing and skiing. The population is only around 2 billion inhabitants, with over 40 million tourists visiting at any given time.