Asteria

Asteria is a Terran Dominion world famed for its saffron-hued sunsets and large canyons. Its most famous landform is the Long Shadow canyons.

It was a site of a Zerg Swarm incursion during Brood War at the Battle of Asteria. The zerg were finally pushed back into the Long Shadow canyons by a combined infantry and armored assault, and the hive was destroyed, ending the zerg threat to the planet.