An astronomical correspondence to the 1470 year cycle of abrupt
... The modelled RRA activity was compared to 5500 years of astronomical data based
on solar and lunar declinations linked to the current perihelion-based Metonic lunation
[Fig. 1], generated using planetarium software: NOVA 2.13, (Hand, 1989–1994) and
SkyChart III (DeBenedictis, 1993–2004). Lunar nodal ...