A temple of the Church of Eru Ilùvatar, sponsored by Varda Elentári
The Starfarers of Elbereth are specialty priests who maintain small towers near SpellJamming Yards, although their time is spent with the ships.
All races are welcome, though Elves, Half-Elves, High Men and Humans are most common. They are obsessed with exploring the sphere of ArdaSpace in detail, viewing it as divine stories made manifest. They take every excuse to get out of atmosphere, though tinkering with ship building and preparing new expeditions can tempt them groundside for a while. They are major agitators for upgrading our near orbital permanent station presence, though their true love is the planets and stars beyond.
They must study or add to star charts at least one hour per day, as a religious observance. A small telescope or lens, sometimes enchanted with continual light, is the most common holy symbol. When on Arda, they pray for spells when the first star or planet is seen in the evening.
They are usually dressed in white, pale blue, or pale yellow, though after 5th level they are entitled to a black cloak with embroidered stars. They wear no armor heavier than padded except for elven chain, which they love for it's scintillating reflection. They wield only staves and slings, though elves may use long swords, and all Starfarers may build skill with ship mounted weapons.
They cast at one level lower if inside an unconsecrated building, and and two levels lower if underground, but cast at one level higher outside of planetary atmosphere, two levels higher outside the asteroid belt, and three levels higher when within a day's travel of a star. These bonuses do not apply outside of Arda's Crystal Sphere.
In addition to Varda bestowing the traditional free daily casting of Light at 1st level and Continual Light at 5th level, Starfarers gain the free daily spell Augury at 3rd level, though only when they can see the stars. This requirement replaces the material component, although a Spyglass or Telescope of at least 100gp value adds 10% to the base chance of a meaningful reply.
Further, SpellJamming vessels piloted by Starfarers in ArdaSpace gain +2SR, which they explain as Varda opening the Star Roads for them.