Conversation so far:
What was the song '39 from the album A Night at the Opera?
'39 is a song by British rock band Queen. Composed by lead guitarist Brian May, it is the fifth track on their fourth studio album A Night at the Opera.
Did the song '39 win any awards?
'39 was a live favourite throughout the 1970s, often being used as a singalong in concert.
What was the song '39 inspired by?
'39 tells the tale of space explorers who embark on what is, from their perspective, a year-long voyage. Upon their return, they realize a hundred years have passed.

Question: Who wrote it?
Self-contained rewrite: Who wrote the song '39?