Wild Space was a region of the galaxy that contained uncharted planets and star clusters. It was located "off the edge of the map" and almost fully unmapped throughout galactic history. In contrast, the Unknown Regions were mapped but largely unexplored.
The mysterious realm of Mortis was located in Wild Space, as were the planets Mulita, Teth, Indoumodo, Kalee, Thune, Pion, Agaris, Lysatra, and Lira San, the original homeworld of the Lasat species.
Wild Space was a large region of unmapped star clusters containing dangerous worlds. The humans of the Core Worlds often expressed prejudice against sentient beings from Wild Space, even against fellow humans. For example, Commandant Deenlark of the Royal Imperial Academy on Coruscant discriminated against Eli Vanto of Lysatra, whom he termed a "backwater yokel" from Wild Space. While the Unknown Regions were mapped, it was mostly unexplored.
The B'omarr Monastery on Teth.
The Lasat homeworld of Lira San was known to be located in Wild Space. It was separated from the rest of the galaxy by an imploded star cluster. The Lasat of Lira San colonized the planet Lasan at some point before the Imperial Era. Eventually, contact between Lira San and Lasan was lost. Those Lasat living on Lasan came to believe that Lira San was a fabled Lasat sanctuary. Ziro the Hutt had his father buried on the jungle world of Teth. Ziro also hid the Hutt Council's records with him.
With the outbreak of the Clone Wars, a conflict that pitted the Galactic Republic against the Confederacy of Independent Systems, exploration of Wild Space slowed considerably. In 22 BBY, Teth hosted a B'omarr Order Monastery, which the Separatist assassin Asajj Ventress used to hide Rotta, the kidnapped son of Jabba Desilijic Tiure. Several of Jabba's bounty hunters and a pair of ARF troopers tracked Ventress to the Monastery. The clones reported this to Jedi General Mace Windu, but the bounty hunters were beheaded. As a result, the Jedi Knight Anakin Skywalker and his new Padawan, Ahsoka Tano, were sent to Teth along with the clone troopers of the 501st's Torrent Company immediately after their victory on Christophsis in order to rescue Rotta. Around a year later, Ziro, Jabba's uncle, was killed there by his estranged former lover Sy Snootles, who retrieved Ziro's stolen Hutt Council records before he could sell it to the Republic.
Wild Space was also known to be the location of an enigmatic planet called Mortis, which was home to a family of Force wielders known as the Father, the Daughter, and the Son. These three figures embodied the balance in the Force, the light side, and the dark side of the Force respectively. The Force wielders tried to convince Skywalker to fulfill his prophesied role as the Chosen One. However, their plans were upended when the Son was corrupted by the dark side; setting in motion a chain of events which led to the deaths of the three Force wielders. Their realm existed outside of the realm of normal time and space.
The Ghost approaching a collapsed star cluster
During the reign of the Galactic Empire, travelers again traversed Wild Space. The new government's Survey Corps even took an interest in the farthest reaches of uncharted space. Demand for maps of Wild Space increased as a consequence, allowing cartographers to make a decent living by producing and selling them. Auric and Rhyssa Graf, a couple of married interplanetary explorers, spent fifteen years making maps of Wild Space until their capture by Captain Visler Korda of the Imperial Navy.
Despite the increased interest in Wild Space, those who resided from it were not as well respected by some during this period. Eli Vanto and his mother and father came from Wild Space, and Vanto in particular was not well respected for some time, despite his service to the Empire.
In 3 BBY, the Lasat rebel Garazeb Orrelios, the Spectres rebel cell, and the Lasat refugees Chava the Wise and Gron took part in a search for the legendary Lasat sanctuary of Lira San. Lira San lay in Wild Space, and could only be reached by navigating through a collapsed star cluster. After being pursued by Imperial forces and a difficult trial, Orrelios managed to used his bo-rifle to guide the rebel starship Ghost through the maelstrom. Chava and Gron settled on Lira San, which they discovered to be the original Lasat homeworld.
Later, Orrelios and the Mandalorian rebel Sabine Wren undertook a mission to Thune City on the Wild Space world of Thune to recover cargo containers and ships on behalf of the rebellion. During their mission, the two came into conflict with the criminal Garbis family.
Following the Battle of Endor, the pirate crew of Eleodie Maracavanya seized control of the Super Star Destroyer Annihilator. With an Imperial Navy warship under their control, Maracavanya came to be known as the "pirate ruler of Wild Space." In 5 ABY, Maracavanya planned to take advantage of the chaos in the wider galaxy by establishing a criminal empire in Wild Space built around individualism and greed.
While searching for Chewbacca, who had been captured by the Empire, Han Solo came under attack and lost contact with his wife Princess Leia Organa on the edge of Wild Space. Later, the New Republic pilots Norra Wexley and Wedge Antilles traveled to the last known coordinates of Han Solo. They were attacked by Commander Valent's Star Destroyer Scythe, but were rescued by New Republic ships led by Commodore Kyrsta Agate, who had received intelligence about Valent from the mysterious Imperial source known as the Operator.
After the end of the Galactic Civil War, Garazeb Orrelios took the former ISB agent turned Rebel spy Alexsandr Kallus aboard an EF76 Nebulon-B escort frigate to Lira San, where Kallus was welcomed as one of them.
During the First Order-Resistance War, General Leia Organa of the Resistance dispatched two of her agents, Finn and Poe Dameron, to the frontier of Wild Space on a supply mission. The two became involved in a daring train heist.
Wild Space appeared in several Legends literature and media including Star Wars: The Old Republic, Star Wars: Darth Vader and the Ghost Prison, and The Essential Atlas. The region made its first Canonical appearance through the planet Teth in the 2008 animated film Star Wars: The Clone Wars.
Pablo Hidalgo explained in Rebels Recon that Wild Space lay "outside" the known map of the galaxy (in other words, 'off the edge of the map'). By contrast, the borders of the Unknown Regions were known and defined on the galactic map but the region remained unexplored.This differs from Legends, where Wild Space is on the edge of the known galaxy while everything beyond the known galaxy is part of the Unknown Regions.