Here's why:
* Monkeys are terrestrial animals: They live on Earth and are not found in space.
* Space is not conducive to life: The vacuum of space, extreme temperatures, and radiation make it impossible for any Earth-based animal to survive there.
* Purple coloration in animals: While there are purple-colored animals on Earth (like some snails and octopuses), the color purple is not a common natural color for mammals like monkeys.
So, while purple monkeys sound like a fun idea, they are just a product of our imagination!