PhD in chemistry 1992
Linux, astronomy, calenders, and many other things.
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delta-T
divination
fumocy
month, synodic_month
proleptic julian calendar
tidal acceleration
atomic time ephemeris time universal time
tropical year
easter
eclipse
Greenwich Mean Time GMT UTC
Hipparchos
Kidinnu
leap second
new moon
full moon
orbit
year
Aratus
precession
Ptolemy
Roma_and_Sinti
secular
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