space
Explanation
The Joke
The comic is a mostly wordless sequence showing a rocket launching from Earth. The rocket travels through space, shedding its stages as real rockets do. The stages separate and the payload continues toward the Moon. Upon arriving at the lunar surface, the payload is revealed to be... a sandwich (or sandwich-making components). The rocket has delivered a sandwich to the Moon.
In the final panel, a mission controller announces: "This is mission control. The Moon is now technically a sandwich. No more NASA funding is necessary."
The Humor
The comic parodies the grandeur of space exploration by reducing it to the most trivial possible mission objective: making the Moon "technically a sandwich." The elaborate multi-stage rocket launch sequence -- drawn with careful attention to realistic staging separation -- builds up expectations of some momentous scientific achievement, only to reveal the most absurd payload imaginable.
The punchline about NASA funding adds a satirical layer. It suggests that the entire space program exists just to check boxes on arbitrary achievements, and once the Moon is "technically a sandwich," the mission is somehow complete. This mocks both the way space exploration is sometimes justified by arbitrary milestones and the perpetual struggle of NASA to justify its budget. The word "technically" does a lot of heavy lifting -- it implies that by the loosest possible definition, placing bread on the Moon satisfies some requirement, much like how organizations sometimes meet goals through technicalities rather than substance.