"look sir, i think we found the planet where turds come from"
"what do you mean ensign?"
"well sir, look at it, it looks like a giant floating ball of turds."
"hmmm..maybe the inhabitants are not carbon based and thus eat carbon based lifeforms wastes." the science officer chines in.
"could be, ensign, prepare to land our totally disgusting looking ship on it, it's time to find out whats there"