When I was a child in the Seventies learning about the planets, Uranus was always pronounced as, well, “your anus.”
The first time I heard the now popular “YOUR-a-nus” pronunciation was when a NASA probe was passing the planet and it was reported on T.V.
I have consulted the most recent Oxford English Dictionary and it offers both pronunciations. However, in my brief research, I cannot find any dictionary printed before 1979 that offers both pronunciations.
Who started this? Was it, as I suspect, newscasters whom didn’t want to be heard uttering what could be mistaken as “potty-talk” [i.e. “A NASA probe passed by Uranus this week.”]?