Infobase, 141 United States. National Aeronautics and Space Administration 77 Jet Propulsion Laboratory (U.S.) 55 SpringerLink (Online Service) 51 Films for the Humanities & Sciences (Firm) 35 Infobase 35 Public Broadcasting Service (U.S.) 33 United States, 32 Broken Arrow Media (Firm) 28 SpringerLink (Online service) 27 United States. Department of State, 27 United States. Department of State 20 Trader Multimedia Inc. (Firm) 18 Goddard Space Flight Center 13 United States. National Aeronautics and Space Administration, 12 United States. Congress. House. Committee on Science, Space, and Technology (2011- ), 11 United States. Congress. House. Committee on Science, Space, and Technology (2011- ). Subcommittee on Space, 11 United States. Congress. Senate. Committee on Commerce, Science, and Transportation, 11 United States. Congress. House. Committee on Science, Space, and Technology (2011- ). Subcommittee on Space and Aeronautics, 10 Japan, 9 National Geographic Digital Media (Firm) 9 ScienceDirect (Online service) 9 United States. Congress. House. Committee on Armed Services. Strategic Forces Subcommittee, 9 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space, 8 BBC (Firm) 7 Library of Congress. Congressional Research Service, 7 United States. Congress. House. Committee on Science, Space, and Technology 7 United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Space Science and Applications 7 Arts and Entertainment Network 6 Cambridge Educational (Firm) 6 Evans, Ben, 1976- 6 Oxford Scholarship Online 6 United States. Congress. House. Committee on Science. Subcommittee on Space and Aeronautics 6 United States. Navy Department 6 Espresso TV (Firm) 5 Ordway, Frederick I., III 1927-2014 5 Russia (Federation), 5 TVF International (Firm) 5 United States 5 United States. Congress. House. Committee on Armed Services. Strategic Forces Subcommittee 5 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Space, Science, and Competitiveness, 5 Carroll, Michael, 1955- 4 European Space Agency 4 Goddard Space Flight Center. Astrophysics Science Division 4 Harland, David M. 1955- 4 India 4 Italy, 4 Laboratory for High Energy Astrophysics (Goddard Space Flight Center) 4 Schrogl, Kai-Uwe 4 United States. Congress. Senate. Committee on Commerce, Science, and Transportation 4 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science and Space, 4 Ames Research Center 3 Billings, Linda, 3 Economist Group Limited (Firm) 3 Fimmel, Richard O. 3 George C. Marshall Space Flight Center 3 Goddard Space Flight Center, 3 Harvey, Brian, 1953- 3 Library of Congress. Congressional Research Service 3 Rapp, Donald, 1934- 3 Space Telescope Science Institute (U.S.), 3 Ulivi, Paolo, 1971- 3 United States. Congress. House. Committee on Science and Technology (2007-2011). Subcommittee on Space and Aeronautics 3 United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science and Space 3 United States. Department of Defense, 3 United States. NASA History Division, 3 United States. National Aeronautics and Space Administration. History Office 3 United States. Space Force, 3 Vakoch, Douglas A. 3 ABC International 2 Alexander, Charles C. 2 Argentina, 2 Asner, Glen R., 1970- 2 Australian Broadcasting Corporation 2 Badescu, Viorel, 2 Bennett, Jeffrey O. 2 Benson, Michael, 1962- 2 Besha, Patrick, 2 Bignami, Giovanni Fabrizio 2 Brazil, 2 Cable News Network 2 Canadian Space Agency 2 Canis, Bill, 2 Ciné Fête 2 Cockell, Charles S., 1967- 2 Dawson, Linda 1949- 2 European Science Foundation. Space Science Committee 2 European Space Agency, 2 European Space Policy Institute 2 Film Ideas (Firm) 2 Garber, Stephen J., 2 Grimwood, James M. 2 Hatton, Scott, 2 Haynes, Robert 2 Inside Science (Firm) 2 Italy 2 Lewis Research Center 2 Lukaszczyk, Agnieszka 2 Lutes, Charles D. 2 Maran, Stephen P. 2