Alukah

Alukah was the throneworld of an intergalactic empire of vampires. Since Alukah's rotational and orbital periods were the same, half of the planet was constantly facing away from its star; in the centre of this dark side was an icebound desert continent where the Alukahites built their Blood Citadel.
Billions of years after the Alukahites were destroyed in a war with a race of celestial beings, Bernice Summerfield and a team of archaeologists went to Alukah to start excavating the ruins of the Blood Citadel. (PROSE: Predating the Predators)