There are two astronauts on a space-walk. This is inherently comedic premise due to astronauts wearing funny big suits (this is a note to future self to make minion astronaut or something picture haha). One astronaut turns toward the choccy milk.
Joke starts here: The choccy milk is, and this is the crucial point I wish to drive across, actual choccy milk. Perhaps it is not triangle or country of Lebanon at great size, maybe instead it is meta joke about "are you winning son" meme. I have seen many such cases as this.
The astronaut, apparently having never seen choccy milk (maybe spaceship has no windows, will try not to be so critical next time) says this: "Wait it's always been choccy milk?" Other astronaut puts gun to his head and says "always has been."
This is funny because it implies large conspiracy to hide the fact that the planet is choccy milk.
Also thank you for participating in this meme tournament. Spread the tournament word: imgflip.com/m/meme-tournament-2