Celestial Order

The Magisters of the Celestial Order study the Lore of the Heavens, which in its widest sense is “Astrometeorological Thaumaturgy,” the magic of the stars, the upper atmosphere, and the weather. The Magisters of the Celestial Order are most commonly referred to as Astromancers, and they are prognosticators, astrologers, and seers without Human peer. These potent wizards also have power over the weather and over various other meteorological phenomena.

It is certainly for these reasons that Azyr’s Magisters are known for their greatest preference for sky and star gazing, and for this reason the Magisters of the Celestial College are sometimes called “Celestial Wizards” by some of the less educated folk of the Empire.

Symbols & Appearances
The Comet, the Crescent, the Eight Pointed Star.

The Magisters of the Celestial College use midnight blue as their prime colour of decoration, and they will normally wear pendants, rings, earrings and brooches in the shape of stars and moons, etc. Due to their unusual wealth, Astromancers can afford to have the very best robes, and everything they wear is of the richest materials and best tailoring.

It is said that as an Astromancer advances in his field and comes ever closer to Azyr, his eyes turn wholly blue and glow with a soft light.

Overview
While the Magisters give the impression of knowing everything before people say anything, this is not, in fact, the case. They know when people are about to speak, but not always what they are about to say. It is, therefore, possible to surprise them. Astromancers tend to be dreamers and are very scholarly. The shifting possibilities of the future have more relevance and are more real to them to them than is the present.

They tend to look up to the heavens a lot with contemplative looks on their faces.

Duties & Contracts
The very wealthiest and most important people seek the Astromancers of the Celestial College in the Empire, in a kind of love/hate relationship. Few nobles would not wish to know how the future turns out for them, either in the short term or long (or both!), but there is nothing in the Articles of Imperial Magic or in the Celestial College’s own Rule that forbids telling people their fortunes, if that is what they wish. However, the Astromancers are required to tell all of that which they see with absolute honesty.

This is a double-edged sword as the Astromancers cannot always direct what areas of the future they will see. So they may indeed be able to see the future in such a way as to win a noble some political influence, but they are just as likely to foresee the day, hour, and style of that noble’s death, and they would be obligated to tell all they had seen, in person.

As a result, though many noble houses seek to contract an Astromancer (for the sake of appearances if nothing else), few pressure him or her too closely to reveal future events. Resultantly, Astromancers tend to be quite wealthy.

Like all Magisters, Astromancers can be seconded to serve in the military throughout their life and as need dictates. As one might expect from an Order of prognosticators, few experienced Magisters are ever surprised or unprepared when the call comes.

Source

 * Warhammer Fantasy RPG 2nd ED -- Realms of Sorcery (pg. 106-108).