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.
Last Total Solar Eclipse Abroad. The last time a total solar eclipse crossed Earth was March 9, 2016. The total eclipse traversed parts of Indonesia, including Sumatra, Borneo and Sulawesi, while viewers in Australia and parts of south Asia and east Asia were able to see a partial eclipse, according to NASA.