Aspero system

The Aspero system is a planetary star system in a remote portion of former Covenant space. The colony of Hesduros, once a populous world of the Forerunner Ecumene, resides within this system.

Silver Timeline
When questioned as to where the Covenant were going to take the Forerunner keystone, Makee told John-117 that it was to the Aspero system. However, this appeared to be a false lead as the UNSC couldn't find any sign of a planet within the system and Makee betrayed them shortly thereafter.

Despite Makee's betrayal, John believed that Makee had been telling the truth about the system. Cortana determined that due to the influence of cosmic strings on the system, there could be a planet there that the UNSC simply couldn't be seen until they arrived. After a rough slipspace transit in Condor 325, Silver Team arrived in the Aspero system and discovered that John and Cortana were right. Following the retrieval of the keystones, Silver Team fled the system.

List of appearances

 * Halo: The Thursday War
 * Halo: Legacy of Onyx
 * Halo: The Television Series
 * Solace
 * Transcendence