Vampires in Space

[SA]

I'm building a setting that my players have described as World of Darkness in Space (Principally incorporating Vampire, Mage and Werewolf).

I would like the vampires to be very similar to the source material, but I'm not sure how they should operate on the dark side of tidally locked planets, wherein their impulse to retire with the coming of the sun would be entirely absent, or on the light side where it would be constant.

Should I simply ignore this entirely, so that they are never required to "sleep"? I know I don't want them to have anything like a human "sleep schedule", but I would like to preserve the suspenseful image of an intrepid mortal or conniving kindred creeping into a vampire lair and staking the dormant monster within.

Other issues, like their response to the sun out in the vacuum of space are easily resolved.

[Hibou]

You could use the light-side of tidally locked planets as kind of a prison for them - maybe even an ultimate weapon for their enemies - where if they're sent there they're pretty much screwed because none of their kin can easily help them, either. On the other hand, they might build massive societies and strongholds on the dark side of such a planet just because they can operate at full power all of the time there.

[Superfluous Crow]

Some ideas:
*They could be shadow vampires of a sort; comfortable in neither total darkness nor total brightness. They flit from shadow to shadow, resting only during the midday sun.
*Maybe they just need to sleep like humans (in a way). On the dark side they just get to choose when to go to bed. Or maybe their sleep cycle is determined by the position of the sun/planet/moon rather than by the actual amount of ambient light.
*random thought: on a slowly revolving planet, vampires might live nomadic lives, following the night endlessly around the globe.

[Nomadic]

Some ideas:
*They could be shadow vampires of a sort; comfortable in neither total darkness nor total brightness. They flit from shadow to shadow, resting only during the midday sun.
*Maybe they just need to sleep like humans (in a way). On the dark side they just get to choose when to go to bed. Or maybe their sleep cycle is determined by the position of the sun/planet/moon rather than by the actual amount of ambient light.
*random thought: on a slowly revolving planet, vampires might live nomadic lives, following the night endlessly around the globe.

This man speaks wisdom, listen to his words (seriously though these are all brilliant ideas).

[SA]

They are indeed very good ideas. Both point 2 and point 3 are things i have considered, assuming daytime does induce a somnolent state.

The effects of the sun are going to be entirely unscientific, having nothing to do with UV radiation, but rather the sun's symbolic impact. This means that an extraordinarily tiny and distant but ever-visible sun might have no effect on a vampire at all. It is the sun's pervasiveness of presence and effectiveness as a symbol of life that influences the creature.

On the other hand, they might build massive societies and strongholds on the dark side of such a planet just because they can operate at full power all of the time there.

This is very good.

[Steerpike]

What if vampires who broke the law/displeased their superiors in the "dark" side were exiled to the light side, to wander in wretchedness from shadow to shadow, never safe from the ever-burning sun?