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

Professor Aurora Sinistra assigned her fifth year Astronomy students in 1995 a long and complex essay on Jupiter's moons.[1]


Ron Weasley erroneously wrote on his that Callisto was Jupiter's biggest moon and that Io wasn't the one with the volcanoes, while Harry Potter wrote that Europa is full of mice, instead of ice. Both essays were corrected by Hermione Granger before being delivered.[1]


Notes and references

  1. 1.0 1.1 Harry Potter and the Order of the Phoenix, Chapter 14 (Percy and Padfoot)
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