Here's the Book from
Desolation Road.
Kepler's Somnium (The Dream)
This work by Johannes Kepler describes his travels to the moon. It requires Latin at Accented or better, Astronomy/TL4-12, Physics/TL4-12, Dreaming-13, and Occultism/TL4-14. It's a thin book weighing 1 lb and available for $50.
It includes Dreamwalk at skill-2, Astral Projection at Skill-5, Ward at Skill-4 and three unique rituals
Protection from the Void
Skill-8; 20 min.
Realm: Matter, Ether
Creates a charm that protects the wearer from the environmental effects of vacuum and hostile environments. For the duration of the effect the wearer has Doesn't Breathe, Radiation Tolerance 5, Temperature Tolerance 10 (5 in each direction), Sealed and Vacuum Support
Bridge of Darkness
Skill-10; 1 hour
Realm: Dimensionality, Ether
The ritual must be performed so that it ends during an astronomical Syzygy (conjunction) in such a way that the philosopher is also in line with all involved celestial objects. The subject will be transported from the surface of one of the involved objects to the surface of one the others through the ether. This does not protect against the elements on the surface of the target. This ritual requires a successful Astronomy roll to pull off.
Celestial Movement
Skill-2*; 10 min
Realm: Forces
*In addition to the penalty for delta-v.
Allows the subject to travel in body through the Ether. This doesn't protect the user from the elements. It grants Space Flight with Newtonian, and Space Flight Only. Move is equal to the ritual's effective skill. The caster must choose a Thrust Factor from 0 to 5 the ritual has twice this in additional penalties. Delta-V is equal to Movex2^(Thrust Factor). Duration penalties do not apply, the effect lasts as long as the subject still has delta-v.
The "Realm" statistic is for the magic system in
Desolation Road (which used both Book and Realm magic), without that it should work with regular Book magic fine.
The philosopher who knew this book used
Protection from the Void quite often (as well as Ward and Astral Projection, but I think he had higher levels from other Books), but that doesn't require Astronomy except as a prerequisite.
Bridge of Darkness was used once.
Quote:
Originally Posted by Anders
In a low-tech world the other obvious use is divination. Astronomy in that kind of world is Astrology - there's no science there yet.
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That appears to be Fortune Telling (Astrology) in GURPS (at least according to
GURPS Fantasy Tech 1: The Edge of Reality)*).
*Is this the longest title in GURPS?