detection of nuclear explosions
41Asteroid-impact avoidance — Planetary defense redirects here. For defending against alien invasion in fiction, see alien invasion. Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometres in diameter releases as much energy… …
42international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
43History of military technology — Part of a series on Science …
44Military funding of science — The military funding of science has had a powerful transformative effect on the practice and products of scientific research since the early 20th century. Particularly since World War I, advanced science based technologies have been viewed as… …
45Actinide — The atomic bomb dropped on Nagasaki had a plutonium charge.[1] The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium thro …
46Bhangmeter — A Bhangmeter is a type of photometer used on satellites that are intended to detect atmospheric nuclear detonations. [cite journal|url=http://books.google.com.au/books?id=GmUEAAAAIAAJ|title=Bulletin of Science, Technology… …
47Yucca Flat — is a closed desert drainage basin, one of four major nuclear test regions within the Nevada Test Site (NTS), and is divided into nine test sections: Areas 1 through 4 and 6 through 10. Yucca Flat is located at the eastern edge of NTS, about ten… …
48Interstellar travel — Montage of fusion powered rocket concepts from 1987–2004, which could form the basis for an interstellar vehicle. Included are: VISTA (Lawrence Livermore National Laboratories,1987), Discovery II (NASA/GRC, 2002), Human Outer Planet Exploration… …
49Vela — /vee leuh, vay /, n., gen. Velorum /vee lawr euhm, lohr , vay / for 1. Astron. 1. the Sail, a southern constellation: one of the subordinate constellations into which Argo is divided. 2. U.S. Aerospace. one of a series of reconnaissance… …
50Beryllium — (pronEng|bəˈrɪliəm) is a chemical element with the symbol Be and atomic number 4. A bivalent element, beryllium is a steel grey, strong, light weight yet brittle alkaline earth metal. It is primarily used as a hardening agent in alloys, most… …
