Astronomy Tower

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 at midnight, when the stars are best seen. The tower is generally out-of-bounds except for classes.

1991
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 sending Norbert away, they were caught by Argus Filch when they descended the tower, because they had forgotten to bring Harry's Invisibility Cloak back with them.

1993
After Sirius Black tried to break in to 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.

1996
The Astronomy practical exam took place here for the O.W.L.s. Under the 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 forced to flee the school. All of this was witnessed by the Fifth years taking their Astronomy O.W.L.s.

1997
When 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, by his own orders.

Structure
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

 * 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, its location makes witnessing Hagrid being attacked by Ministry officials by the Fifth years taking the Astronomy O.W.L.s in Order of the Phoenix impossible, as the Astronomy Tower is located far east of the castle and would not have clear view of Hagrid's Hut (this event was not featured in the films).

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter and the Half-Blood Prince (video game)
 * Harry Potter and the Deathly Hallows
 * Harry Potter and the Deathly Hallows: Part 1 
 * Harry Potter and the Deathly Hallows: Part 2
 * Harry Potter and the Deathly Hallows: Part 2 (video game)
 * Harry Potter: A Pop-Up Book
 * LEGO Harry Potter: Characters of the Magical World
 * The Wizarding World of Harry Potter
 * LEGO Harry Potter: Years 5-7
 * Harry Potter LEGO Sets