Neptune is unique among the major planets in one funny way: we knew it existed on paper before we knew it was in the sky ;=3

Percival Lowell tried the same trick for "Planet X" but, uh, it didn't work. Pluto wasn't it, and turns out Neptune's orbit was off model only because we hadn't estimated its mass correctly

🔴 so Lowell rediscovered Neptune, haha, typical

go eat some chocolate, Chara