Essay on Jupiter's moons

"[Harry] turned miserably to Professor Sinistra's equally long and difficult essay about Jupiter's many moons."

- Description

Professor Aurora Sinistra assigned her fifth-year students in 1995 a long and complex essay on Jupiter's moons. Ronald Weasley erroneously wrote on his that Callisto was Jupiter's biggest moon and that wasn't Io the one with the vulcanoes, while Harry Potter wrote that Europa is full of mice, instead of ice. Both essays were corrected by Hermione Granger before being delivered.

Appearances

 * Harry Potter and the Order of the Phoenix