The Astronomy Tower is the tallest tower at Hogwarts Castle. It is where students study the stars and planets through their telescopes in Astronomy lessons with Professor Aurora Sinistra. This is usually done during midnight when the stars are best seen.[1] The tower is usually out-of-bounds except for classes.[1]



In Harry Potter's first year, he and Hermione Granger climbed to the top of the Astronomy Tower to send Rubeus Hagrid's pet dragon, Norbert, to Charlie Weasley in Romania. Despite their success in giving Norbert away, they were caught by Argus Filch when they descended the tower because they had forgotten to take Harry's Invisibility Cloak back with them.


After Sirius Black tried to break-in the Gryffindor Tower on the evening of 31 October, 1993, all the staff was to search the Castle for any signs of Black. Argus Filch searched the Astronomy Tower and found nothing.[2]


The Astronomy practical exam took place here for the O.W.L.s. Under supervision of Professor Tofty, students were required to fill out a star chart. However, Dolores Umbridge, John Dawlish and several other Ministry of Magic officials attacked Rubeus Hagrid during this practical, and the resulting skirmish caused several Aurors and Professor Minerva McGonagall to be severely injured, Fang too become incapacitated, and Hagrid was caused to flee the school. All of this was witnessed by the Fifth years taking the Astronomy O.W.L.s.


Harry and Dumbledore at the Astronomy Tower in 1997.

The Death Eaters arrived at Hogwarts, most of the Battle of the Astronomy Tower between the opposing sides took place in this tower, and in the corridor below. Death Eaters set off the Dark Mark above this tower; Albus Dumbledore was blasted from the tower's ramparts by a Killing Curse cast by Severus Snape. This was where Dumbledore met his death under his own orders.[3]


The Tower from behind

The Astronomy Tower from above

The tower is the tallest in Hogwarts, it lies almost directly above the front doors of the castle. The tower is also surrounded by a parapet and is tall enough to have a perfect view of the starry sky.

Behind the scenes

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  • The exterior of the Astronomy Tower is featured at The Wizarding World of Harry Potter.
  • In the PC adaptation of Harry Potter and the Philosopher's Stone, the Hogwarts Library is inside the Tower, on the lower floors.
  • The Bloody Baron likes to groan and clank up on the Astronomy Tower according to Nearly Headless Nick.
  • In the film adaptation of Harry Potter and the Half-Blood Prince the tower is directly over the Transfiguration Courtyard. This is the reason for the courtyard to have changed shape in both the film and the video game. Unlike the book, the tower isn't the tallest tower at Hogwarts and doesn't have a complete view of the night sky.
  • Also, in the films, the witnessing of Hagrid being attacked by Ministry officials by the Fifth years taking the Astronomy O.W.L.s would be impossible, as the Astronomy Tower is located far east of the castle and would not have clear view of Hagrid's Hut.
  • In fanfiction, a common romantic trope is to have the couple of the author's choice engage in illicit trysts on top of the Astronomy Tower. Such a plot device never occurs in either the books or the films, though Molly Weasley did mention that she and Arthur had been out at night and she was scolded by the Fat Lady after returning late and Arthur was caught by the caretaker; it is possible that they had been on a romantic and illicit tryst on the Astronomy Tower.

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The Harry Potter Wiki has 50 images related to Astronomy Tower.

Notes and references

Hogwarts Castle
Astronomy Tower · Bell towers · Boathouse Bell Tower · Central Tower · Clock Tower · Dark Tower · Founders' Tower · Gryffindor Tower · Headmaster's Tower · Herbology Tower · Hospital tower · Hufflepuff Duelling Turrets · Marble Staircase Tower · North Tower · Octagon Tower · Pepperpot · Quidditch tower · Ravenclaw Tower · Right Long Gallery tower · Second-floor girls' lavatory tower · Small Locked Tower · South Tower · Stone Bridge Tower · Suspension Bridge towers ·The Quad battlements · Training Grounds Tower · Turris Magnus · Turris Medius · Upper Hall tower · Viaduct Courtyard checkpoint towers · West Tower · West Tower battlements
Portraits, statues and other artwork located in the towers
Albus Dumbledore · Armando Dippet · Valeria Myriadd · Dexter Fortescue · Dilys Derwent · Oraclitus Spheer · Fat Lady · Sir Cadogan · Slytherin knight · Hufflepuff lady · Heliotrope Wilkins · Severus Snape · Phineas Nigellus Black · Vulpus · Quentin Trimble · Limebert · Ravenclaw lady · Rowena Ravenclaw · Walter Aragon · Quidditch player · Professor · Female etiquette teacher · Gryffindor lady · Gryffindor man · Gryffindor man · Gryffindor man · Gryffindor seeker · Red-haired witch · Young maiden · Vase with flowers · Group of women in crinolines · Sinister-looking monks

Astronomy Pottermore.png
Professors: Aurora Sinistra
Astronomy at Hogwarts: Astronomy department · Astronomy Tower · Astronomy Room · Astronomy Stairs · Astronomy Corridor · Astronomy reading room ·
Astronomy classroom
Astronomers: Aurora Sinistra · Copernicus · George von Rheticus · Perpetua Fancourt · Hesper Starkey
Objects: Globe of the Moon · Lunascope · Moon chart · Orrery · Star chart · Telescope
Planets: Jupiter · Mars · Mercury · Neptune · Pluto · Saturn · Uranus · Venus
Satellites: Callisto · Europa · Ganymede · Io · Moon
Constellations: Bartholomeus · Orion
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