It doesn't piss me off, but the so-called dark side of the moon can be fully lit, just like the near side.
Also, Columbus did not go to prove the world was round -- that was known since the time of ancient Greece.
I can do you one better. Columbus did discover India.
India was a European exonym (Indians themselves never called their country India) and at that time - long before any political entity known as "India" existed - the word was used to describe, essentially, all he be dragons territory beyond the Muslim world but not Cathay. It loosely corresponded, basically, to what we now call the Orient although the Orient slowly drifted east from the Near/Middle East.
Columbus was,
tautologically, correct that he found India because
he found the shit that lays to the east. Even the point about him thinking he was further west than he was is irrelevant because he did not think he had landed on the landmass of the modern day nation-state of India, just that he was clearly
over there, which by the definitions of their day - the people who came up with the word "India" before the Hindoos adopted it - he was.
Only later did it become clear that the new landmass was so far away from known India that mentally grouping it with it did not make sense, and even to that extent they still clearly distinguished this through the
West Indies and
East Indies, the latter now known as
Indonesia, or the, you guessed it, fucking INDIA ISLANDS.
This makes me furious ever since I learned it.
Edit: To clarify, the Europeans didn't know there was
a Pacific either. Not of that scale.