A substance is anhydrous if it contains no water, for example, salts lacking their water of crystallisation. The way of achieving the anhydrous form differs from one substance to another.
A partial solar eclipse at its peak at 3:37 p.m. in Mesa on Oct. 23, 2014. The eclipse was visible over most of North America and covered 44 percent of the Arizona sun. Michael Chow/The Republic.
Next total solar eclipse in Nebraska 3 May 2106. Last total solar eclipse in continental U.S. 26 February 1979. Next total solar eclipse in continental U.S. 8 April 2024. Next total solar eclipse visible anywhere on Earth 2 July 2019 (South Pacific, Argentina) Average period of time between total solar eclipses in one spot 380 years. Average period of time between total solar eclipses on Earth ~1.3 years (67 in the 21st century)