[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/simpsons_06_13.jpg]]
Episode - 2F11\\
First Aired - 2/5/1995

After unleashing an unflattering balloon caricature of Principal Skinner, Bart is forced to help Skinner with his early-morning astronomy...and Bart [[AchievementsInIgnorance fooling around with the telescope]] leads to the discovery of a comet that's on a collision course with Springfield.
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!!This episode contains examples of ([[YMMV/TheSimpsonsS6E14BartsComet YMMV]]):
* AchievementsInIgnorance: Skinner has been at his astronomy for years, makes very calculated and precise adjustments with his telescope with the hope of finding something interesting, and has ultimately turned up nothing. Bart screws around with the telescope for a few seconds, spins it around haphazardly, and discovers a comet.
* ApocalypseHow: Class 0, as the comet's potential destruction seems to be limited to just Springfield.
* BaitAndSwitch: Ned finds all of Springfield right outside his bomb shelter, glaring at him and in some cases carrying weapons. Moe angrily states they want in the shelter themselves, but Ned tells them there's no space. So Moe just calmly announces they'll all "go off and die, then", and everyone turns to leave.
* BigNo: Skinner unleashes four of them over the course of the episode.
* BrickJoke: A running one involving the "Big Butt Skinner" balloon.
* ChekhovsGunman: As Professor Frink starts his presentation, a man frantically yells "QUIT STALLING! WHAT'S THE PLAN!?!". That same man appears later that season in "The PTA Disbands", yelling [[TitleDrop "The PTA has disbanded!"]], and jumping out a window before being informed that [[NonIndicativeName the PTA did]] ''[[NonIndicativeName not]]'' [[NonIndicativeName disband]], jumping back through that window.
* ComicallyMissingThePoint: This exchange between Bart and Lisa, when they realise the comet is approaching Springfield:
-->'''Lisa:''' Don't you realize what's happening, Bart? Your comet is gonna collide with the earth and every living thing in its path will be killed.\\
'''Bart:''' I knew you'd try to find something wrong with my comet, Lisa. You've always been petty and small, right from the beginning.
* TheCuckoolanderWasRight: Early on, Homer shrugs off the comet's perceived threat, claiming that it will burn up in the atmosphere and end up "no bigger than a Chihuahua's head." That's exactly what happens, complete with a nearby Chihuahua for comparison.
-->'''Bart:''' What's really amazing is that this is ''exactly'' what Dad said would happen.\\
'''Lisa''': Yeah, dad was right.\\
'''Homer:''' I know kids... ''I'm scared too...'' (the family hugs together, terrified)
* DemocracyIsBad: Congress is about to pass a bill on the evacuation of Springfield from the comet, but then the bill has pornography rider attached to it, and is promptly struck down. This leads Kent Brockman to declare: "I've said it before, and I'll say it again: Democracy simply doesn't work."
* FreezeFrameBonus: Kent's "the following people are gay" list consists of ''Simpsons'' staff members.
* GilliganCut: When the only bridge out of town is blown up:
--> '''Lisa''': We're doomed!\\
'''Homer''': It's times like this, I wish I were a religious man.\\
'''Lovejoy''': ''(running through the streets)'' It's all over, people! We don't have a prayer! Aaaahh!!!
* {{Homage}}: The final act has several to ''Series/TheTwilightZone'' episode "The Monsters Are Due on Maple Street".
** There are even stronger parallels to another TZ episode titled "The Shelter". What makes it all the more hilarious is that, unlike in "The Shelter", Flanders ''did'' build his bomb shelter with the intention of letting other people in, but Homer wants to kick him out anyway.
* {{Hypocrite}}: Homer condemns everyone (including the Flanders family) for Ned having to leave the shelter when it was Homer's own idea to kick him out in the first place.
* {{Irony}}: Out of all people in the shelter, the one to leave was Ned Flanders, who built it in the first place.
** The only thing the comet destroyed was the bomb-shelter that was supposed to protect everybody (it also pops the balloon).
** Skinner's been trying to find unnamed objects in the sky for years, to no success. Bart looks through the telescope (unsupervised) for all of three seconds and discovers a comet.
* JerkWithAHeartOfGold: Hypocrisy or not, Homer is the first one to leave the shelter to look for Ned. Moe shortly follows.
** JerkassHasAPoint: And he knew the sound Moe was making was a Baby Ox. Which prompts Moe to be the first after Homer to follow him.
* LookBehindYou: Database assumes Bart is trying to pull this on the Super Friends, since comets could not be seen in broad daylight and without a telescope, before realising the comet is approaching Springfield.
--> '''Database:''' I make it a point never to turn my head unless I expect to see something, Bart.
* MisBlamed: When everything is said and done, [[{{In-universe}} Moe]] pins the blame of the comet almost destroying Springfield... on the town's observatory.
-->'''Moe''': [[ScienceIsBad Let's go burn down the observatory]] [[InsaneTrollLogic so this'll never happen again.]]
* ModelPlanning: During the town meeting to discuss how to stop the comet, Professor Frink uses a model to show the results of what could happen...[[ButtMonkey each one resulting in Moe's tavern getting destroyed by flames]].
* NoodleIncident: Skinner got even with Principal Kohoutek... "him and that little boy of his."
** Homer's story of how he drove away from some unnamed crime and missed work.
* RuleOfThree: Skinner's BigNo when he finds out Bart discovered a comet, that he just let go of the balloon and read the front page article about how the Prez says school is for losers.
* ScrewThisImOuttaHere: After Skinner's attempts to down the balloon fail, Bart attempts to flee the scene, to no avail. ("Race you to Utah, Milhouse.")
* TookALevelInJerkass: Homer's grudge against Flanders escalates from petty jealousy to trying to leave him for dead to the comet. He at least has the graciousness to regret it afterwards (if in a hypocritical tone in which he blames it on the townspeople).
* UnreadablyFastText: Kent Brockman's newscast:
--> '''Kent''': Now, over the years, a newsman learns a number of things that for one reason or another, he just cannot report. Doesn't seem to matter now, so... the following people are gay. ''(LongList scrolls really fast up the screen)''\\
'''Marge''': ''(disgusted)'' Turn it off.\\
'''Homer''': ''(taking notes)'' Just a second...
* WhereTheHellIsSpringfield: The congressman presenting the bill on the evacuation of Springfield from the comet is about to mention the state where the town is when he's interrupted by another congressman attaching pornography rider to it.
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