CAIRO, July 11, 2018 (MENA) - A partial solar eclipse will take place on Friday but will not be observed neither in Egypt nor in the Arab region, said the National Research Institute of Astronomy & Geophysics (NRIAG). The partial eclipse will be only observed over the Indian and Pacific Oceans in addition to parts of South Australia, head of the astronomy department at the institute Ashraf Latif Tadrous told MENA. But residents of Egypt and the Arab region will be able to observe the full lunar eclipse, the longest ever to take place in the 21st century, on July 27, he said. It will take 103 minutes and will be also observed in large parts of Australia, Asia, Africa, Europe and South America, he added. This is the second lunar eclipse this year, he said. The first one took place in January. It will start at 7.15 p.m. and will reach its peak at 10:20 p.m. The moon will pass through the center of the Earth's shadow. Full lunar eclipse is called blood moon as the Moon appears to be reddish because of Rayleigh scattering and the refraction of that light by Earth's atmosphere into its umbra.