The characteristics of the O2 Herzberg II and Chamberlain bands observed with VIRTIS/Venus Express

► Nightglow emissions properties of O2(c1Σu--X3Σg-) 0-ν″ progression are investigated. ► Three bands of the O2(A′3Δu-a1Δg) Chamberlain system are investigated. ► Simultaneous observations of VIRTIS/Venus Express in the visible and IR are compared. ► A one-dimensional model is applied to explain the peak altitude of the three systems.