Numerous historic monuments had been produced with solar phenomena in mind; for example, stone megaliths precisely mark the summer months or winter solstice (one example is in Nabta Playa, Egypt; Mnajdra, Malta; and Stonehenge, England); Newgrange, a prehistoric human-constructed mount in Eire, was designed to detect the Winter season solstice; the

Nadir (Antizenith) — is a point while in the celestial sphere Positioned underneath the horizon, opposite the zenith. In relation on the Sunshine, Here is the least expensive point reached through the Sunlight in its orbit, relative on the observer. "UVA rays are normally connected to the growing old of pores and skin cells and are typically t