The Lord of the Rings was published in 1954, adding to the story that J.R.R. Tolkien began with The Hobbit in 1937 and starting a pop culture craze that led to movie adaptations, Comic-Con costumes, and even the names of landmarks on Saturn’s largest moon, Titan. 

Six of Titan’s hills are named after central characters in the series: Bilbo, Handir, Nimloth, Arwen and Faramir Colles were all named in 2012. (“Colles” isn’t another Tolkien reference: it’s actually a term that planetary experts use to refer to hills.) Naming a hill after Gandalf wasn’t approved until July 2015, a full 360 years after Titan was discovered in 1655.