Pervade
131X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …
132Czech literature — is the literature written by Czechs or other inhabitants of the Czech state, mostly in the Czech language, although other languages like Old Church Slavonic, Latin or German have been also used, especially in the past. Modern authors from the… …
