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MMMNWA.PAGE 4. I»LAIM>KALKH HKHALIJ. FRIDAV. DECEMBKR 21. IW Nation/World Y Shuttle's calendar Often filled with success By William Harwood UPli people take 1 icleoce writer ; CAPE CANAVERAL, Fla. - The space agency's un- jwecedented shuttle launch-a- month pace came to a standstill in December, but Discovery's dramatic satellite rescue mission . in November ended the program's •/year with a flourish. '* Challenger had been scheduled r to blast off Dec. 8 to carry a top- 'secret Air Force satellite into or- *lt. The flight was postponed when engineers discovered they would . have to replace about 4,000 insula­ tion tiles because a bonding layer beneath them had weakened. Discovery now is scheduled to fly Challenger's mission Jan. 23. Challenger is tentatively schedul­ ed to return to space Feb. 20 to launch a shuttle tracking satellite *nd a Canadian communications velay station. ! Overall in 1984, six astronauts Jetpacks for spectacular »-flying spacewalks and four flew aboard a shuttle, lathy Sullivan became the first American woman. to walk in pace. A crippled science satellite was ifully repaired, a giant ex- «t package was dropped for a year in the harsh space favlronment and orbital refueling lechniaues were demonstrated pat will be used later to refuel satellites that have run out of gas. ' The vear started out dismally the two satellites -- Palapa and Westar 6 -- carried into space (board Challenger Feb. 3 were stranded In useless orbits by failure of two commercially- developed rocket motors. •' The losses rocked the insurance ndustry, which paid out $180 tUlion In claims to the owners of e satellites, Indonesia and ffestern Union. * "The loss Of those two satellites was, in my opinion, the lowest part of the program," said Jesse Moore, NASA's shuttle director. VThlngs looked pretty bleak at that point about recovering from (hose two failures." ; But Challenger's mission ended with a flourish. Astronauts Bruce JicCandless and Robert Stewart became human satellites when they took turns flying free up to JM feet from the shuttle using jet backpacks ! Challenger blasted off again on N>rtf «. The crew's mission: to rendezvous with the crippled l»l*r Max sun-watching satellite S> two spacewalkers could repair eapaeecraft. | Astronauts George Nelson and James van Hoften did just that in a stunning display of the shuttle torstem'S capabilities. Solar Max *as successfully repaired and placed back in service to continue |tspioneering studies of the sun. • The new shuttle Discovery was kheduled to make its maiden flight in June but a computer glitch on June $5 delayed the launch 24 hours and the next day the launch was aborted just four seconds before liftoff because of trouble with a fuel valve. It took space agency engineers three months to get the shuttle ready for its third launch attempt, this time with a three-satellite payload made up of what was to have been flown on Discovery's first two flights. Discovery finally, streaked into space Aug. 30. Commander Henry Hartsfield and his crew' suc­ cessfully launched all three satellites, two equipped with im- \ proved boosters similar to those that failed in February. Sally Ride, the first American woman to fly in space, used the shuttle's robot arm during her se­ cond flight to launch a climate- watching satellite. Sullivan and David Leestma tested satellite refueling techniques during a spacewalk in the ship's open payload bay. Discovery returned to orbit Nov. 8 1 >r the most ambitious shuttle flighi to ,1 ale and for what turned out to be the last flight of the year. The five-member crew launch­ ed two communications satellites and rescued Palapa and Westar before returning to Earth. Astronauts Dale Gardner and Joseph Allen took turns using jet- packs to snag the slowly spinning satellites so they could be placed in special cradles in the payload bay. When an adaptor mechanism did not fit, the crew simply put a backup plan into effect and the spacewalkers manually wrestled the 1,200-pound spacecraft into their berths. Insurance underwriters, who now own both spacecraft, hope to resell the relay stations to recover to milliw of thpir 'Pffiffis vitamins By Gino Del Guercio M M- UPISctnce Writer :.;|5 vvv The wrong people are often tak­ ing vitamins and minerals. -A?} Some of those who are taking vitamins -- particularly, people who take megadoses -- are in danger of poisoning themselves. Others who desperately need vitamins but do not get them risk severe nutritional deficiencies. "In large doses, some vitamins are potentially toxic," said Pr. Richard S. Rivlan, chief of the nutritional service at Memorial Sloan-fyettering Cancer Center in New york. "They build up In your system and can do real damage.'1 Rivlan is concerned that some people have the wrong impression about vitamins. Many people seek vitamins as a way Of getting in­ creased energy or super health. In reality, vitamins are simply chemicals the body needs in minute quantities to function pro* perly. Like motor Oil in a car, vitamins will not make the body run any faster, but without them rtie body will stop dead. dominate farming thab on0 specialised Most humans get vitamins they need In I As long as they eat diet. all the their 1604. a balanced M. RENT RINSEtfVJIC the professional do-it-yourself carpet (leaning system First Hour of Rental $1.00 p»r hour for ovory hour thereafter. (Example-} hours - total charge $1 plus taif.) ** ®S"S'Sj;rr1)|J -'/riu - Special Rental Rate Good Moo-Thur* RINSE 'N VAC cleans the way professionals do at a fraction of the cost. FRI. ~ SAT S SUN. >400 • per hour ! OVERNIGHT SPECIAL! -.8:00 pm-9:00 am 1,000 mm 4400 W. RTE. 120 -McHENRY, IL Probably the largest group at risk of vitamin deficiency are alcoholics. Alcohol prevents many important vitamins from being absorbed by the body. Other groups at risk for vitamin deficiencies include the elderly, drug abusers, extreme dieters and the urban poor. RivUrtf said the risk1 of taking very large doses of vitamins varies greatly depending on the type of vitamins a person takes. 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Livestock sensors, frozen em­ bryo transfers, weeding robots and computerized links to database services will join animal*! iffid crops on future farme> said Donald Holt, director of the tBinois Agricultural Experi­ ment Stattoh. "The .complex information net­ work, neceaaary for such a farm, however, will be well on its way to deveMi^t by 1990," Holt said. "The further we progress in this direction, the more rapid develop* meht will be." . -V&:' Many farmers are skeptical about using computers to replace old methods, because the machines do not have common sense, intuition, reason or per­ sonality, he said. Farmers today are on the brink of changing farm technology, Holt told his audience. "The first thing that will hap­ pen, that actually is happening now, is that conventional farm machines will become more specialized and able to do a better job," he said. "They/will move from the status of tbols to that of performers of tasks." "Then, we can expect to see a gradual move to multipurpose machines that are programmed to more thai! one task," he said. "Instead of chang­ ing machines, as farmers do now, you will put in a different program cart, chip or whatever " Holt told farmers that he recognizes the difficulty they face in making decisions about com­ puterized farms and other opera­ tions. "Scientists are faced with the same bewildering number of op­ tions, in a situation where there is so much to be done and so much can be done that one hardly knows where to start," he said. , "But you are, in fact, in an en­ viable position," he said. "You are like explorers in an un­ chartered wilderness ... you definitely have a chance to stake a claim on part of the territory." YOUR COMPLETE CHAINSAW HEADQUARTERS ,V: ,/v. . £l ill; mm ssasSSssT" SSSrE£==a 3.W SHOP FARM AND FLEET FOR A GREAT SELEC­ TION OF OUTDOOR POWER EQUIPMENT...AT THE LOWEST PRICES ANYWHERE! " " - <***.'.< 'j; y N o w y o u J 1 MfMm. 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