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济南尿酸值正常标准是多少
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发布时间: 2025-06-03 00:00:29北京青年报社官方账号
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  济南尿酸值正常标准是多少   

CAPE CANAVERAL, Fla. (AP) — The spacecraft team that brought us close-ups of Pluto will ring in the new year by exploring an even more distant and mysterious world.NASA's New Horizons spacecraft will zip past the scrawny, icy object nicknamed Ultima Thule (TOO-lee) soon after the stroke of midnight.One billion miles beyond Pluto and an astounding 4 billion miles from Earth (1.6 billion kilometers and 6.4 billion kilometers), Ultima Thule will be the farthest world ever explored by humankind. That's what makes this deep-freeze target so enticing; it's a preserved relic dating all the way back to our solar system's origin 4.5 billion years ago. No spacecraft has visited anything so primitive."What could be more exciting than that?" said project scientist Hal Weaver of Johns Hopkins University, part of the New Horizons team.Lead scientist Alan Stern of Southwest Research Institute in Boulder, Colorado, expects the New Year's encounter to be riskier and more difficult than the rendezvous with Pluto: The spacecraft is older, the target is smaller, the flyby is closer and the distance from us is greater.NEW HORIZONSNASA launched the spacecraft in 2006; it's about the size of a baby grand piano. It flew past Pluto in 2015, providing the first close-up views of the dwarf planet. With the wildly successful flyby behind them, mission planners won an extension from NASA and set their sights on a destination deep inside the Kuiper Belt. As distant as it is, Pluto is barely in the Kuiper Belt, the so-called Twilight Zone stretching beyond Neptune. Ultima Thule is in the Twilight Zone's heart.ULTIMA THULEThis Kuiper Belt object was discovered by the Hubble Space Telescope in 2014. Officially known as 2014 MU69, it got the nickname Ultima Thule in an online vote. In classic and medieval literature, Thule was the most distant, northernmost place beyond the known world. When New Horizons first glimpsed the rocky iceball in August it was just a dot. Good close-up pictures should be available the day after the flyby.ARE WE THERE YET?New Horizons will make its closest approach in the wee hours of Jan. 1 — 12:33 a.m. EST. The spacecraft will zoom within 2,200 miles (3,500 kilometers) of Ultima Thule, its seven science instruments going full blast. The coast should be clear: Scientists have yet to find any rings or moons around it that could batter the spacecraft. New Horizons hurtles through space at 31,500 mph (50,700 kph), and even something as minuscule as a grain of rice could demolish it. "There's some danger and some suspense," Stern said at a fall meeting of astronomers. It will take about 10 hours to get confirmation that the spacecraft completed — and survived — the encounter.POSSIBLY TWINSScientists speculate Ultima Thule could be two objects closely orbiting one another. If a solo act, it's likely 20 miles (32 kilometers) long at most. Envision a baked potato. "Cucumber, whatever. Pick your favorite vegetable," said astronomer Carey Lisse of Johns Hopkins. It could even be two bodies connected by a neck. If twins, each could be 9 miles to 12 miles (15 kilometers to 20 kilometers) in diameter.MAPPING MISSONScientists will map Ultima Thule every possible way. They anticipate impact craters, possibly also pits and sinkholes, but its surface also could prove to be smooth. As for color, Ultima Thule should be darker than coal, burned by eons of cosmic rays, with a reddish hue. Nothing is certain, though, including its orbit, so big that it takes almost 300 of our Earth years to circle the sun. Scientists say they know just enough about the orbit to intercept it.COMPARING FLYBYSNew Horizons will get considerably closer to Ultima Thule than it did to Pluto: 2,220 miles versus 7,770 miles (3,500 kilometers vs. 12,500 kilometers). At the same time, Ultima Thule is 100 times smaller than Pluto and therefore harder to track, making everything more challenging. It took 4 ? hours, each way, for flight controllers at Johns Hopkins' Applied Physics Lab in Laurel, Maryland, to get a message to or from New Horizons at Pluto. Compare that with more than six hours at Ultima Thule.WHAT'S NEXTIt will take almost two years for New Horizons to beam back all its data on Ultima Thule. A flyby of an even more distant world could be in the offing in the 2020s, if NASA approves another mission extension and the spacecraft remains healthy. At the very least, the nuclear-powered New Horizons will continue to observe objects from afar, as it pushes deeper into the Kuiper Belt. There are countless objects out there, waiting to be explored. 4591

  济南尿酸值正常标准是多少   

CAPE CANAVERAL, Fla. - Calling all planets that orbit around bright, nearby stars: NASA's new Tess spacecraft is looking to do a head count.The Transiting Exoplanet Survey Satellite — Tess for short — is embarking Monday on a two-year quest to find and identify mystery worlds thought to be lurking in our cosmic backyard. The spacecraft aims to add thousands of exoplanets, or planets beyond our solar system, to the galactic map for future study.Life might be out there, whether microbial or more advanced, and scientists say Tess and later missions will help answer the age-old question of whether we're alone.Tess is flying on a SpaceX Falcon 9 rocket, scheduled to blast off at 6:32 p.m. Monday from Cape Canaveral Air Force Station. 756

  济南尿酸值正常标准是多少   

CARLSBAD— It's the winter sport most famous for being a bit odd. Curling usually soars in popularity during the Winter Olympics, but you can also play year-round, even in sunny San Diego.Each week, members of “Curl San Diego” gather at the Icetown Skating Rink in Carlsbad to teach people curling. “It’s fascinating and something you don’t usually see, so everyone wants to try it,” said Owen McLachlan, the club’s vice president.The idea behind curling is simple. Shove a 42-pound rock as close to the center of a target as possible.In reality, it’s not so easy. “It’s usually called, ‘Chess on Ice,’” McLachlan said. Similar to bocce or shuffleboard, the team closest to the center gets the points.The sweeping heats up the ice, reducing friction and allowing the stone to travel farther and straighter.“An eighth of an inch can make or break a shot,” said Karen Coombs, who grew up playing in Canada, but now lives in San Diego.The Carlsbad club started after the 2006 Winter Olympics in Torino, Italy. Organizers say a lot of Canadians in San Diego wanted a place to play, and when the Winter Olympics come around..“We'll have 200 people for a learn to curl,” Coombs said. A close-knit community just a stone's throw away. “Anywhere you have ice, you can have curling,” McLachlan said.For more information on Curl San Diego, click here. 1348

  

Checkpoints and road closures are in effect around Mar-A-Lago.: Reminder to all motorists: The checkpoints and road closures are in effect around Mar-A-Lago. Expect traffic delays in this area through Sunday, January 3, 2021. Motorists are encouraged to… https://t.co/WLVNaoPfxT— Town of Palm Beach (@townpalmbeach) December 23, 2020 347

  

Buying a designer dog is pricey, so now, people are turning to financing options to pay the high price tags. However, these financing options could come with even higher costs.That's what one woman, Victoria Caruth. came to learn. She fell in love with Duchess, a Yorkie.The dog came with a hefty price tag of ,600. Caruth couldn't afford it, but the pet store offered financing, so she accepted their offer.When Caruth got home with Duchess, her husband asked to see the paperwork.The paperwork revealed Caruth had agreed to lease her dog for two years with interest, paying almost triple the original price of the dog. 630

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