Even if you are in a room in a house, you are still in the universe. That's why Teddy wants you to teach him a song (about the universe) on the yukulele.

Yü is composed of 冖 mien an obsolete word meaning cover as radical, with 于 yü as phonetic. It means space, the empyrean, but is here part of the surname of the founder of the Northern Chou dynasty, A.D. 557—589.