Planetary scale Memes

The astronomical fact stating "63 Earths can fit inside Uranus" is completely legitimate science—Uranus has a volume about 63 times that of Earth! But let's face it, nobody's reading that sentence with a straight face. The planetary name creates the perfect setup for an unintended anatomical joke that's been making astronomy students snicker since the planet's discovery in 1781. The commenter's confession about needing maturity just makes it funnier because we're ALL thinking it. This is why astronomers sometimes emphasize the pronunciation as "YOOR-uh-nus" in desperate attempts to maintain classroom decorum.