– Understanding historical records from different cultures
– Criteria to classify naked-eye observations (e.g. aurorae, comets, sunspots, halo displays)
– Reconstruction of solar activity for the past millennia with telescopic and naked-eye sunspots as well as aurorae (possibly also with solar-wind-blown comet tails)
– Grand Minima
– Small solar system bodies (comets, meteors, and their connection)
– Earth rotation and moon orbit acceleration from historical eclipses and other occultations
– Historical novae and supernovae (possibly also SN impostors, kilo-novae, etc.)
– History of astronomy
– Exchange input from and to astronomy with other disciplines such as history, chronology, geophysics, climatology, etc.