移动版背景故事：超空间跳跃门
斯叶特时代始于卡伦对埃郎之眼的伟大发现。随着这一发现，沉睡已久的超空间门网络被重新启动，这使得超空间跳跃的距离不再受到超空间核心的限制，而更重要的是人们还能够穿越通往邻近星系的跳跃门来实现跨越银河的旅行。在此之前，这被认为是无法实现的壮举。即使在今天，埃郎之眼网络的所覆盖的范围仍是未知的。
早在银河标准历9626年跳跃门开放之时，希格拉人便开始绘制超空间门网络的导航星图，但在戴阿米德的批准和控制下，星图的绘制工作受到希格拉海军的严格管理。
虽然家园星系中有许多其他种族曾向戴阿米德请愿，要求对其他盟国开放对埃郎之眼网络的探索权限。但希格拉人却以“维护银河系安全”等理由拒绝他们的请求。
尽管星系内目前还没有国家能够挑战希格拉的霸权，但可以预见的是国际局势会因此变得紧张。
首次通过跳跃门的远征行动由希格拉海军一手操办，其中规模最大的一次是9631年前往光轮银河的拉撒路远征队。
尽管单舰执行远征任务的失败几率一直居高不下，但希格拉本土仍然与两处外银河殖民地保持着联络。其中一个是位于厄洛斯星系（Eros galaxy）的研究前哨站，另一个是位于极光星系的文兰定居点（Vinland settlement in Aurora）。在无基斯者接管了戴阿米德之后与这些哨站的联络成为了受到保护的机密事项。
无基斯者控制下的新戴阿米德大幅减少了官方性质的超空间门网络探索行动，但仍有大量未经授权的远征在他们的控制之外进行，而希格拉海军对此则是采取了视而不见的默许态度。
最后一批被戴阿米德允许穿过大门的官方远征舰队之一——亚拉拉特特遣舰队（Task Force Ararat），在前往光轮银河后便与本土失去了联系。
The Age of S’jet began when Karan herself located the Eye of Aarran. With this discovery came the unlocking of the hyperspace gates, allowing instantaneous travel across enormous distances without the aid of a hyperspace core. More significantly the gate network allowed travel to neighboring galaxies, a feat deemed impossible until then. The extent of the network, even today, is unknown. The Hiigarans naturally began efforts to map the network even as early as Aarran’s opening in 9626 GSY.Efforts to map the Hyperspace network are tightly controlled by the Hiigaran navy, with approval officially delegated by the Daiamid on Hiigara. Though many other races in the Homeworld Galaxy have petitioned the Daiamid to open up exploration from other allied nations, the Hiigarans have refused, citing claims of maintaining galactic security. This has caused a predictable rise in tensions though the rest of the galaxy is not in a place to challenge the Hiigaran’s supremacy.The first expeditions through the gates were exclusively efforts by the Hiigaran Navy, the largest of which was the Lazarus Expedition to Nimbus in 9631 GSY. Though the failure rate remains high for single-ship expeditions the Hiigarans maintain two extra-galactic colonies still in contact with Hiigara. One of them is a research outpost in the Eros galaxy, while the other is the Vinland settlement in Aurora. After the Kiithless takeover of the Daiamid, contact with these outposts became a classified matter for their protection.The new Daiamid under Kiithless control has sharply curtailed official gate expeditions, though plenty of unauthorized ventures still happen outside of their control while the Hiigaran Navy looks the other way. One of the last official expeditions sanctioned by the Daiamid to pass through the gate, Task Force Ararat, has vanished without a trace after departing for Nimbus.
