Her dissertation was Die Basler Mayatafeln; astronomische Deutung der Inschriften auf den Türstürzen 2 und 3 aus Tempel IV in Tikal, and was promoted by J. O.
[1] Brack-Bernsen founded the “Regensburg” workshop series, which assembled specialists in Babylonian astronomy for intense and productive discussions about critical areas in the field.
[3] One of Brack-Bernsen's most important contributions to the field of the history of the exact sciences was her identification of a method used by Babylonian astronomers for predicting the time between the rising and setting of the moon and sun, called the lunar six, that are preserved on tablet TU 11.
Brack-Bernsen identified a process for predicting lunar six values based on the Saros cycle.
Brack-Bernsen identified and outlined this method in TU 11, and its use is bolstered by the inclusion in Goal-Year texts of lunar six values from one Saros period earlier.
However, the daily retardation of a new moon cannot be measured directly due to the lack of visibility around conjunction (except in the event of an eclipse).
The length of the Saros cycle is established as 223 synodic months, which corresponds to 6585 days + 6 to 11 hours.
The variability in the number of hours is caused by the combination of lunar and solar anomaly and the fact that the Saros cycle does not equate to a whole number anomalistic months, and, therefore, does not indicate an exact return of lunar velocity.
[2][10] A festschrift, Studies on the Ancient Exact Sciences in Honour of Lis Brack-Bernsen (John Steele and Mathieu Ossendrijver, eds.)