Ralph Barton, "Twinkle, Twinkle Little Star"
“Twinkle, twinkle, little star, How I wonder where you are!
“1.73 seconds of arc from where I seem to be.” Replied the star, “because ds2 = -[1/2(M/Y)] 1 dr2 - r2 d?2 - [1/2(N/?)]dt.”
“Twinkle, Twinkle Little Star”