The UMARK website


Some useful links when working with MAXCLOCK :


Astronomical timekeeping and Earth orientation (Delta-T,  DUT1, etc.)

IERS official documents

Celestial mechanics in general

Moon-related phenomena

Sun-related phenomena

Calendars

The discussion on the lengths of the tropical and the anomalistic year ...

Celestial navigation and fixed stars

Geographical coordinates

Time zones and legal time

Precision timekeeping

Documents of historical interest


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www.umark.de/maxclock_links_e.html   last revised: 2025-08-30