Astra

Astra, also called the Everlasting Dream, was a powerful moon god. They were one of the three machine gods of Circadia's central pantheon along with Ignata and Vadstus, with domains including the moon, water, the seas, the afterlife and humanity.

Astra's death lead to the Cascade, since her control of the oceans was unbound. Worship of Astra is largely nonexistent following her death. Astra is symbolised by a crescent moon formed out of spirals.

The Astramarine
Circadian records point to the existence of a Mind called the Astramarine that existed during the Empire's reign. In that time, minds would not have gone into the Deep Dreaming after death - instead, they went to the Astramarine, Astra's own realm, where they could remain intact for eternity in Astra's memory.

The existence of the Astramarine has been linked with resurrections being possible at the time, since the mind being returned to the body would have been whole. However, following the Cascade, the Astramarine was rendered inaccesible.