"""
Core module tests package.

This package contains unit tests for all starward core modules:
    - angles: Angle arithmetic, parsing, trigonometry
    - coords: Coordinate systems and transformations
    - time: Julian dates, sidereal time, calendars
    - constants: Astronomical constants
    - sun: Solar position and phenomena
    - moon: Lunar position and phases
    - observer: Observer locations
    - visibility: Observability calculations
"""
