Cow and Chicken - Season 2 - Eps 11: Comet!
Cow and Chicken's class go on a field trip to the Cometorium, where Chicken is bored stiff. After getting hit by one of Dad's golf balls (he was golfing right next door), Chicken hangs it in front of the telescope; soon, the whole town is in panic of the arrival of ""Dad's Ball Comet"".
About Cow and Chicken

Title: Cow and Chicken
First Air Date: 1997-09-16
Last Air Date: 1999-08-13
Status: Ended
Rating: 7.1/10 (from 464 votes)
Language: EN
Seasons: 5
Total Episodes: 156
Network: Cartoon Network
Genres: Animation, Comedy, Kids
Production Companies: Hanna-Barbera Productions, Cartoon Network Studios, David Feiss Productions
Synopsis
Follows the surreal adventures of a cow, named Cow, and her chicken brother, named Chicken. They are often antagonized by "The Red Guy", who poses as various characters to scam them.
Cast

Charlie Adler
Cow / Chicken / The Red Guy / I.R. Baboon (voice)

Candi Milo
Mom (voice)

Dee Bradley Baker
Dad (voice)

Michael Dorn
I.M. Weasel (voice)