Luna, more commonly known as the Moon, is Earth's only natural satellite, it is, among the satellites of major planets, the largest relative to the size of the object it orbits. It appears in a few episodes.
The moon usually appears within the show as a typical moon. However, in episodes such as "Sandy's Rocket" and "Mooncation," the real life celestial body is shown.
Sandy first mentions the moon after SpongeBob asks what she is going to do with the rocket. She then says that she is going to the moon and shows the moon on a poster. SpongeBob then asks if he can go to the moon. Sandy tells him no, but after some persuasion, Sandy allows him to go. He then runs around the rocket mentioning that he is going to the moon.
Later, Sandy has a Pop-Gun and SpongeBob asks if they are going to hunt on the moon. Sandy says that it is for harvesting moon rocks. Soon, Sandy says that she has been to the moon and there are no aliens there.
That night, Patrick comes over and says that he has heard about SpongeBob's moon trip and says that he has come to give SpongeBob some Alien-Out!.
Later, after starting the rocket, Patrick and SpongeBob find themselves in space. Unknowingly, they orbit the moon for a while and then fall back to Bikini Bottom . Sandy follows the rocket using a jet pack and finds the two aren't there.
Meanwhile, in Bikini Bottom, SpongeBob and Patrick think they have landed on the moon. After capturing Gary and Squidward with the net guns, thinking that they are aliens, who are projected to look like Gary and Squidward, SpongeBob and Patrick find Mr. Krabs and Mr. Doodles outside Squidward's house. The two hold him up and Mr. Krabs tells them to shoot him, but not his money. SpongeBob then says that they don't want his money and calls him a "moon man".
After capturing everyone in town, the two face Sandy and capture her as well. She tries to tell the two that they are not on the moon and in Bikini Bottom, but the two close the rocket's hatch before she can finish.
After Patrick accidentally captures himself, SpongeBob goes back to the moon thinking that he is going to Bikini Bottom. When he gets there, he realizes his mistake.
It appears outside the Krusty Krab towards the beginning of the episode. It later appears there when Patrick is preparing to lower SpongeBob down to pretend to be the Flying Dutchman. It later appears when Patrick starts running after being stung by a Jellyfish. Later, it appears when the real Flying Dutchman is about to show up. It finally appears at the end of the episode, when Patrick runs away from SpongeBob.
It appears at Floater's Cemetery. It appears next to the sign. It also appears behind a ship in the cemetery. It later appears when Mr. Krabs does his jump above the skeletons. I then appears with the island, while Mr. Krabs' fighting noises can be heard.
It first appears in the episode, when SpongeBob and Patrick think that the Fisherman was after them. It is revealed to just be Jellyfish clumped together to make a silhouette similar to that of the Fisherman.
It later appears twice when Squidward dresses up as the Fisherman.