Word: hydrogen
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
...test flight, Spacelab will contain some 70 experiments designed by scientists from the U.S., Western Europe, Canada and Japan. Among them: a French experiment that will measure the radiation produced by sunlight's action on hydrogen; a West German high-resolution camera that will map the earth's surface; a U.S. study that may help explain the life cycle of stars and galaxies. Other tests will determine the advantages of fabricating specialized terrestrial materials (crystals, alloys, ceramics) in conditions of weightlessness rather than on earth. There are also studies to see how humble forms of life adapt...
...other hand, Teller, who is considered the father of the hydrogen bomb, acknowledged that while the development of such weapons will prove scientifically difficult, it is necessary to curb a growing Soviet military threat...
...astronomers realized that most of the universe's 90-odd elements, or types of atoms, had been "cooked" not at the moment of the universe's explosive birth but inside the hot furnaces of subsequently formed stars in fusion processes similar to those that occur when a hydrogen bomb detonates. But as they gazed out upon the heavens with their telescopes and spectrometers, astronomers found that the composition of stars varied enormously, containing different atoms and in different proportions...
...girth of 100 million miles or more, but now is only a few miles in diameter. A teaspoonful of its material weighs as much as 100 million tons, and the star's gravitational force is so strong that it pulls away a steady stream of gases, mostly hydrogen and helium, from its larger companion. As the gases spiral toward the neutron star, they heat up, reaching such high temperatures (up to 10 million°C) and densities that the atoms of hydrogen smash into each other and fuse. This causes a runaway thermonuclear explosion that spews a torrent...
...Soviet news agency TASS announced last week that Nobel Peace Prizewinning Physicist Andrei Sakharov, exiled to the city of Gorki since 1980, would not be allowed to accept an invitation from Vienna University to teach there for a year. The ostensible reason: Sakharov, who helped develop the Soviet hydrogen bomb in the 1950s, knows too many state secrets...