ɐ mˈoːɹ ɹˈiːsənt haɪpˈɑːθəsˌɪs ɪz ðˌɐɾɪt ɪz ɐ fˈɔːɹm ʌv tɹˈænsiənt ˈɔːɹoːɹˌiː ɔːɹ ˈɛɹɡloʊ kˈɔːzd baɪ ʌnjˈuːʒuːəli hˈaɪ sˈoʊlɚɹ æktˈɪvᵻɾi ˌɪntɚɹˈæktɪŋ wɪððɪ ˌʌpɚ vɛnˈuːʒən ˈætməsfˌɪɹ.
A more recent hypothesis is that it is a form of transient aurorae or airglow caused by unusually high solar activity interacting with the upper Venusian atmosphere.