Terraforming is a technology to transform planets other than the Earth into environments similar to Earth so that humans can live on them. The use of such technology requires an inordinate amount of material and time, and, therefore, very unrealistic. However, the development of the hyperspace gate made the transportation of materials easier, and thus the application of such technology much less difficult. Moreover, by sending sunlight through the hyperspace gate, a reliable source of light was secured, making it possible for humans to migrate to planets farther away from the Earth.
The following planets/satellites are now inhabited by humans because of terraforming technology.
Every part of the planet is inhabitable, from its deserts to its cities. Venus has a population of 500 million, atmospheric pressure of 2 to 3, and temperatures that range from 31 to 35 degrees Celsius. Floating in the sky is a giant plant that was created to terraform the planet. (The cityscape that appears at the end of Waltz for Venus was designed according to Watanabe’s personal vision of a Middle Eastern city. Additionally, the world language in the story setting for Bebop is mainly English and Chinese, but there are slight variations on every planet with the inhabitants of Venus usually speaking Arabic.)
Notes: I'm not entirely sure about the translation for the atmospheric pressure of Venus, but there is no unit in the Japanese text, so it's just been translated as is.
Absolutely love it when mangaka and anime directors do Japanese Period Pieces or fantasy lands and draw heavy inspiration from them but explicitly make them leftist/anti-nationalist/anti-authoritarian instead of leaning into certain connotations and in Shinichiro Watanabe's case, make a point to try and spotlight marginalized and Indigenous narratives.
Also, the fact that the Wano arc takes the barebones concept of the Chushingura story (surviving vassals of an unjustly executed lord) and dispenses with all the ludicrous historically politicized notions of seppuku and ultimate submission to authority–also notably a story that was adapted to WWII nationalist/fascist cinema–and immediately says "isolationism bad", "death to feudalism/crony capitalism/war profiteering/environmental destruction", "open up the country". It's not a perfect projection of my personal politics by any means, nor do I expect it to be by any means or intend to interpret it as such, but it's so good