Word origin · etymology
Historical astronomical model label.
True is the conventional counterpart to mean, indicating an instant-dependent rather than averaged node. The adjective is part of the model's name.
How we know · epistemology
Instantaneous orbital model
The calculation uses the Moon's instantaneous orbital geometry, retaining variations omitted by a mean model. True names that modeling choice; it does not establish that this node convention produces truer astrological interpretations.
Connected concepts
Terms used in this explanation
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.