The planet 
Fictional history 
The Super Star Destroyer Knight Hammer was destroyed here when it was diverted towards the planet's core after a collision with a rebel vessel.
Yavin 4 
|Distance from Galactic Core||40,500 light-years|
|System||Yavin Star System|
|Number of suns||1|
|Population||21.2 million. less than 5 after the rebellion left|
|Affiliation||New republic/ Rebel Alliance|
Fictional history 
In the cinematic series 
The Rebels established their base in the ancient Massassi ruins found in the lush jungles of Yavin 4 following the abandonment of their previous base on the planet Dantooine. The Galactic Empire sought to use its new space station superweapon, the Death Star, to destroy the small jungle moon and crush the Rebellion. A force of twenty-two X-wing and eight Y-wing starfighters as shown by the Special Edition were sent to destroy the Death Star. With seconds remaining before the moon was to be destroyed, Luke Skywalker, thanks to the timely assistance of his friend Han Solo and the ghostly advice of Obi-Wan Kenobi to use The Force, was able to fire proton torpedoes into a small thermal exhaust port along the Death Star's equatorial trench, thereby destroying the station and saving Yavin 4 from destruction.
All except three Rebel Alliance craft were destroyed in the attack, the only survivors being Luke Skywalker, Wedge Antilles, and an unnamed Y-wing pilot (perhaps Keyan Farlander), and possibly a gunner, making four, not including Luke. The survivors are seen in the film when Luke disembarks his X-wing. Following the Death Star's destruction, a great ceremony was held, during which Princess Leia presented medals of honor to Luke Skywalker and Han Solo.
This battle became known as the Battle of Yavin, and its date is used as a place-marker for events in the expanded Star Wars universe. Events before the Battle of Yavin are marked by BBY ("Before the Battle of Yavin"), and events that occur after are marked by ABY ("After the Battle of Yavin").
The Yavin 4 moon was also the site of giant Massassi Temples built ages ago by the Massassi to worship Naga Sadow, a Sith Lord who had enslaved and mutated the Massassi using Sith Alchemy. The Temple later housed the Rebel Alliance, who used it for shelter and camouflage during their stay on Yavin 4. The Alliance built tall observation towers to monitor entries and exits from their hidden base. The main temple was destroyed during the Yuuzhan Vong occupation of Yavin 4.
Expanded Universe 
In Tales of the Jedi, it is stated that Yavin 4 was where Naga Sadow hid from the Republic in 5,000 BBY and was discovered several hundred years later by the fallen Jedi Freedon Nadd. According to the comic series, the Massassi warriors who built the ruins used by the Rebels were brought to the planet by the Sith Order in its early years.
In the Jedi Academy Trilogy, Kevin J. Anderson suggested that Exar Kun had the temples built. Enveloped in the dark side, Kun elevated himself to the stature of a god. He enslaved the Massassi and forced them to construct an intricate complex of massive temples that were used for arcane Sith ceremonies and rites as foci for the dark side.
In the animated micro-series Star Wars: Clone Wars, Anakin Skywalker has a fierce battle with Asajj Ventress, a follower of Count Dooku. Finally Anakin defeats Asajj, sending her falling down a dark abyss.
Yavin 4 appears in the downloadable content for the video game Star Wars: Knights of the Old Republic.
Yavin 13 
|This section does not cite any references or sources. (March 2012)|
Yavin 13, a hot desert moon populated by Gerbs and Sliths (a serpentine species). In the game Star Wars: Knights of the Old Republic, it is possible to visit a space station orbiting Yavin 13.
Real-world relevance 
Astronomers have been discovering "extrasolar" planets (planets that orbit stars other than the Sun) the last few years. Some of these extrasolar planets are large and resemble Yavin, although astronomers cannot yet tell whether any Earth type planetary moons exist around such extrasolar planets. The most intriguing of these extrasolar planets is HD 28185 b, which orbits in its star's habitable zone in a circular orbit. However, such planets are currently predicted to be white, with water clouds. Another such planet is 55 Cancri f.The Filming Location for the Rebel Base was in Guatemala
- Simon Beecroft, Kerrie Dougherty, James Luceno, and Kristin Lund, "Planet Profiles: Yavin 4", The Complete Locations of Star Wars: Inside the Worlds of the Entire Star Wars Saga (DK, 2005), 13.
- Claire Boobbyer and Peter Pollard, Guatemala Handbook (Footprint Travel Guides, 2002), 323.
- One book, for example, discusses how the "False reports of the discovery of planets outside our solar system, called extra-solar planets, have arisen since..." See Jeanne Cavelos, The Science of Star Wars: An Astrophysicist's Independent Examination of Space Travel, Aliens, Planets, and Robots As Portrayed in the Star Wars Films and Books (Published by Macmillan, 1999), 5–8.
- Yavin Prime on Wookieepedia: a Star Wars wiki
- Yavin 4 on Wookieepedia: a Star Wars wiki
- Yavin 13 on Wookieepedia: a Star Wars wiki