is that the time it would require to complete 1 revolution, shown specifically in figure 1 of the article ? Also - wouldn't the north star(s) (polaris, deneb e

is that the time it would require to complete 1 revolution, shown specifically in figure 1 of the article ? Also - wouldn't the north star(s) (polaris, deneb etc) also move, even if slightly, in that period of time as well ?