Slow winners. (Science News of the year: the weekly newsmagazine of science).To make the first antimatter antimatter: see antiparticle. antimatter Substance composed of elementary particles having the mass and electric charge of ordinary matter (such as electrons and protons) but for which the charge and related magnetic properties are opposite in sign. atoms that move slowly enough to be studied, physicists combined ultracold antiprotons and antielectrons into atoms of antihydrogen an·ti·hy·dro·gen n. The antimatter equivalent of hydrogen. antihydrogen The antimatter that corresponds to hydrogen. . Such atoms annihilate an·ni·hi·late v. an·ni·hi·lat·ed, an·ni·hi·lat·ing, an·ni·hi·lates v.tr. 1. a. To destroy completely: The naval force was annihilated during the attack. (right) when they hit ordinary matter (162: 286). Researchers also took a first, cursory peek inside antihydrogen and found matter and antimatter to be fundamentally alike, as expected (162: 399). |
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