astro_rotation_EQJ_GAL

<p>Calculates a rotation matrix from J2000 mean equator (EQJ) to galactic (GAL).</p>

Provides access to the 'Astronomy Engine' C library
(<https://github.com/cosinekitty/astronomy>) by Don Cross. The library
calculates positions of the Sun, Moon, and planets, and predicts
astronomical events such as rise/set times, lunar phases, equinoxes,
solstices, eclipses, and transits. It is based on the 'VSOP87' planetary
model and is accurate to within approximately one arcminute. This package
bundles the single-file C source so that other R packages can link against
it via 'LinkingTo' without shipping their own copy.

Mitchell O'Hara-Wild

astronomyengine

astro_rotation_EQJ_GAL: Rotation Matrix from EQJ to GAL

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