scienceyoucanlove: Originally, the word “nebula” referred to almost any extended astronomical object (other than planets and comets). The etymological root of “nebula” means “cloud”. As is usual in astronomy, the old terminology survives

scienceyoucanlove: Originally, the word “nebula” referred to almost any extended astronomical object (other than planets and comets). The etymological root of “nebula” means “cloud”. As is usual in astronomy, the old terminology survives

tags: All Day & All Night.,

from: https://madloveforya.tumblr.com/post/59571250374