. "\"NASA FACTS is a collection of NASA's science series which is intended as an \"easy-to-understand explanations of scientific phenomena involved in projects undertaken by NASA\". The NASA FACTS Science Series was published frequently at irregular intervals, each presenting \"an analysis of a particular subject within program perimeters and scientific disciplines of interest to NASA\"."@en . . . . . . "NASA FACTS"@en . "\"NASA FACTS is a collection of NASA's science series which is intended as an \"easy-to-understand explanations of scientific phenomena involved in projects undertaken by NASA\". The NASA FACTS Science Series was published frequently at irregular intervals, each presenting \"an analysis of a particular subject within program perimeters and scientific disciplines of interest to NASA\"."@en .