I've sung this song, but I'll sing it again,
Of the astronomers I've met and the planets I've seen.
Of some of the questions that troubled bothered their mind
And now good old Pluto has been left behind, saying:

So long, it's been good to know yuh;
So long, it's been good to know yuh;
So long, it's been good to know yuh.
What a long time since Pluto was found,
And now it'll be driftin' along.