Doctor Aphra is totally telling the origin of the Sith.

Ordu Aspectu roughly translates to 'Order of Glare' in Latin.Order of the Terrible Glare is from the EU (but has been referenced in canon). They were a splinter group of Jedi who used the dark side. It was basically Alan Moore's way of explaining how dark siders began before anyone knew what the Sith were.In the EU the first Dark Jedi got excommunicated because they were trying to find out how to be immortal.The Ordu Aspectu tried to find out how to be immortal.The Order of the Terrible Glare's leader was Rur and their world was Garn.The Ordu Aspectu's leader is Rur and their world is Garn.In the EU Luke Skywalker went to Garn and fought the Order of the Terrible Glare after ANH.In canon Luke is about to go to Garn to fight the Ordu Aspectu in the new arc of the main comic.Sources: http://ift.tt/2lZyhSc http://ift.tt/2m18p70 http://ift.tt/2lZA3Ti http://ift.tt/2m17OSL via /r/StarWars http://ift.tt/2m0XwSQ