Advise on Alien world and galaxy

[Sapiento]

I remember that I once read a book by Fred Hoyle (Rockets in Ursa Major? - I'm not sure about the title) where he used (I have to translate back from the German version): heliocentric - this was degrees, and astrograde - this was distance from the sun in miles or AU. Then add maybe a third direction - vertical - for distance above or below the system's plane.

[eburacum45]

If an inhabitant of a rotating planet faces the rising sun, on the left hand will be north, on the right hand will be south. So the four cardinal points could be labelled

Rising (East)
Left, Leftward, Sinister (North)
Right, Rightward, Dexter (South)
Setting, Falling (West)

However, these labels wouldn't work on non-rotating worlds such as tidally locked planets, or on planets which (like Mercury) have a resonant rotation so that the Sun rises in different directions at various times of the year. Nor would they work on stars or black holes. But each of those types of object could have their own distinct set of cardinal points.