Big Questions - NASA Science: Structure & Evolution of the Universe Big Questions NASA has defined a set of space and Earth Science questions that can best be addressed using the Agency’s unique capabilities. NASA works with the broader scientific community, considers national initiatives, and the results of decade-long surveys by the National Research Council in defining these questions. See also the Science Strategy section for more information about how NASA Science is pursuing these questions. By pdboyerin Public bookmarkswith cosmologynasaresearchresultsspacestructuresuniverse