Word: cluster
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Dates: during 1970-1979
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Five years in building, MMT incorporates many design innovations. All six mirrors, plus a small .8-meter (30-in.) guide telescope in the center of the cluster, are mounted on a single Y-shaped yoke that tilts and turns like a gun mount. Rather than a traditional dome, MMT's designers opted for a cheaper rectangular Y OF ARIZONA building that rotates with the telescope. A small moat keeps out dust and stray snakes, scorpions and rats. Yet MMT'S most unusual feature is its internal laser tracking system. It enables all six telescopes to follow the same...
...flexing of the hinges in the waves forces the pistons to pump water, turning turbines that produce electricity. A small prototype string of rafts in the English Channel now produces a mere 1 kw., but its designer, Sir Christopher Cockerell, who also invented the Hovercraft, says that a cluster of 300 larger rafts could generate as much energy as a big conventional power station...
...hour excursion to Gettysburg's Civil War battlefield, some 17 miles north of Camp David. As the group viewed monuments and century-old cannons, Carter attempted to lighten the mood by joking that the gun had a range of three miles, vs. 300 to 400 yds. for the cluster bombs that the U.S. sold to Israel after the 1973 war. Sadat and Begin somehow managed a laugh. But reporters accompanying the entourage noticed a marked lack of warmth between the Egyptian and Israeli leaders; they barely spoke to each other during the excursion. When Sadat did talk to an Israeli...
Besides the possible black hole in Cygnus, one appears to be part of another double-star system in the constellation Scorpius (the Scorpion). Three more may have been detected, each at the heart of a globular cluster of stars in the halo of the earth's Milky Way galaxy. In the inner regions of these clusters, which contain tens of thousands of individual stars, some of the stars are revolving with wobbly motions, as if disturbed by a center of enormous gravity. Herbert Gursky and Andrea Dupree of the Harvard-Smithsonian Center for Astrophysics believe that these stars "may well...
...Once an egg is fertilized by one of the many spermatozoa, it is then transferred to another dish of blood serum and sustaining nutrients. For the next three to six days, the fertilized egg divides, creating a cluster of cells called a blastocyst...