Future of Earth the ozone layer that protects the surface from ultraviolet (UV) radiation from the Sun. An increase in UV-B radiation of only 10–30% is sufficient to cause a significant impact to life; particularly to the phytoplankton that form the base of the oceanic food chain. A supernova explosion at a distance of 26 light years will reduce the ozone column density by half. On average, a supernova explosion occurs within 32 light years once every few hundred million years, resulting in a depletion of the ozone layer lasting several centuries. Over the next two billion years, there will be about 20
Sun goddess of the Earth Sun goddess of the Earth The Sun goddess of the Earth (Hittite: "taknaš UTU", Luwian: tiyamaššiš Tiwaz) was the Hittite goddess of the underworld. Her Hurrian equivalent was and her Sumerian/Akkadian equivalent was Ereshkigal, both of which had a marked influence on the Hittite goddess from an early date. In the Neo-Hittite period, the Hattian underworld god, Lelwani was also syncretised with her. In Hittite texts she is referred to as the "Queen of the Underworld" and possesses a palace with a vizier and servants. In the Hittite New Kingdom she is attested as the mother of two weather gods.