Here's why:
* Scientific classification is for organisms: Scientific names are used to categorize plants and animals based on their shared characteristics. Humans, like all other species, have a scientific name (Homo sapiens).
* The act of walking on the moon is not a defining characteristic: There's no biological or scientific distinction between someone who has walked on the moon and someone who hasn't.
Instead of a scientific name, we would use terms like:
* Lunar astronaut: This is the most common and accurate way to describe someone who has walked on the moon.
* Moonwalker: This term is less formal but widely understood.
Let me know if you have any other questions!