Word: nucleus
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Welfare for Watts. To do the research, U.C.L.A. has created the nucleus of a truly first-rate teaching staff, luring men from other campuses with annual salaries of $25,000 or more. From Rome's Istituto Superiore di Sanita came Chemist Daniel Bovet, a Nobel prizewinner in 1957. Another Nobel recipient, Willard Libby, helps make U.C.L.A.'s chemistry department one of the ten best in the U.S. In the past six years, U.C.L.A. has created ten new interdisciplinary study centers, ranging from brain research to medieval and Renaissance studies to space science, a College of Fine Arts, Schools...
...handle can be a headache, particularly in places like Miami, hotbed of militant Cuban exiles, where the name of Fidel's kid brother and Defense Minister is anathema. "I was in Miami not long ago," the Mexican-born U.S. career diplomat told the Nucleus Club in Phoenix, "and 20 minutes after I checked into a hotel, the word got around that Raúl Castro was in town. I was afraid to walk across the lobby. From now on, when I travel from El Salvador to Washington, I'll go by way of New Orleans...
...behavior suggests that the comet generated no heat, but was warmed entirely by solar radiation. Another set of observa tions seemed to bear them out: temperatures of the comet's head and tail were always identical. If the comet supplied some of its own heat, its head, or nucleus, should have been warmer...
Scientists are less sure what comets look like. They weigh perhaps a trillion tons, or one billionth the mass of the earth. There is probably a central region, or nucleus, of about five miles of solid material. This could be one solid rock or a collection of rocks. Some scientists think there is no nucleus...
Surrounding the "nucleus" is a vast expanse of dust particles, which could be as huge as 100,000 miles across. The tail is similar in structure, and may be as long as 200 million miles, although some comets have almost no tail...