Sentence:  And obviously, since the year of the <WSD>Uranians</WSD> lasts 84 of our years, the continuance of the sun above the horizon would last for many years. [...] And as with the summer day, so with the winter night, years elapse before either comes to an end. For upwards of 20 years, in a latitude corresponding to that of London, the <WSD>Uranians</WSD>—if there are any—never see the small Uranian sun. 
Meaning of the word marked with <WSD> tags:  An inhabitant of the planet Uranus. (from 1830s)