Knossa Spaceport Knossa Spaceport was a spaceport on the planet Ossus constructed around Mount Agorn in the Eocho Mountains . Located on the outskirts of the city of Knossa , the spaceport was constructed by the Jedi Order so that pilgrims could have easy access to the Eye of Ashlanae and the Praxeum built nearby . History . Constructed by the Jedi Oder circa 24 , 500 BBY , the sprawling spaceport was built to provide Jedi pilgrims a place to land their ships and rent airspeeders as they journeyed to the Eye of Ashlanae . As the city of Knossa formed around Ashlanae , the spaceport came to be known as Knossa Spaceport . Nearly 20 , 000 years after its initial construction , the spaceport began servicing those Jedi traveling by air to the distant Great Jedi Library , located in Ooroo Canyon some distance from the city . At the end of the Great Sith War , the Brotherhood of the Sith assaulted Ossus in a raid on the Great Library . Having received word that the stars in the Cron Cluster had gone supernova , the Jedi had initiated evacuation procedures and were unable to draw up proper defenses against the Sith . As the spaceport bustled with activity between those fleeing and those carrying precious artifacts offworld , former Jedi Knight Ulic Qel - Droma confronted his brother Cay Qel - Droma at the landing pads of Knossa Spaceport during the planet ' s last hours . When Ulic Qel - Droma slew his younger brother in a fit of rage , the site was tainted by the action and hallowed in the Force . Wandering off the platform and onto the broad promenade that led out of the city and to the Great Library , Qel - Droma was stripped of his ability to use the Force by several of his Jedi allies as punishment for his crimes . These actions created a vergence in the Force , tainting the entire area with dark side energies . Shortly after these events , the planet was scorched by the supernova and Knossa Spaceport was reduced to twisted stone , metal , and heaps of rubble . In the following centuries , as surviving tribes of Jedi and their descendants reclaimed the world and began calling themselves the Ysanna , this site ' s potent dark side allure was noted . To ward off the unwary from crossing these vergences , the Ysanna created a thirty - meter perimeter of astromech - sized black stones around each site . The Ysanna observed that those who crossed the perimeter and entered into the vergence would have their emotions twisted by the Force , seeing their closest friends as their most dangerous of foes . Layout . A sprawling complex , Knossa Spaceport was constructed at the base of Mount Agorn a mountain in the Eocho Mountain Range . Multiple levels high , the rooftop of the Spaceport was designed to resemble a massive promenade with a large domed structure containing flight control and customs for those arriving and departing the planet . Aside from the rooftop promenade - style landing area and the hangars on the sides of the building , several landing fields surrounded the mountain ' s base to service overflow from the main landing areas . From the ground entrance of the Spaceport , a paved avenue wound its way away from the spaceport to the distant Great Library in Ooroo Canyon .