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2025-05-25 16:09:01
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  成都治肝血管瘤哪种方法效果好   

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

  成都治肝血管瘤哪种方法效果好   

CAMPO, Calif. — Campo Elementary School students were forced off a school bus after a man stormed onto the bus armed with two knives.Matthew Barker, 37, of Campo, was arrested by the San Diego Sheriff's Department after he boarded the bus packed with students at an apartment complex on Friday around 8:30 a.m., according to Mountain Empire Unified School District superintendent Kathy Granger.Officials said Barker entered the bus and was immediately told by the driver to leave. Barker ignored the driver and continued up the stairs and toward students before the driver got in front of him.As Barker tried to push past the driver, a grandmother of one of the students saw what was happening and got onto the bus to help the driver, officials said. That's when Barker reportedly pulled out a knife and swung at the driver.As the driver and grandmother struggled with Barker, an older student ushered students to the back exit of the school bus and called to nearby parents for help. The students were able to exit out of the bus unharmed.Another good Samaritan then got on the bus, at which point Barker turned the knife on himself, according to the Sheriff's Department. The Samaritan pried the knife away from Barker and pulled him off the bus as deputies arrived.Barker has been charged with felony assault. Authorities are investigating the incident and believes drugs were a factor in the attack.The bus driver and Samaritans were not injured."We take safety very seriously and want to assure you our buses remain a safe form of transportation for getting children to and from school," Granger said in a statement. 1669

  成都治肝血管瘤哪种方法效果好   

CARLSBAD, Calif. (KGTV) - Hundreds of people packed into a classroom in Carlsbad Wednesday night, concerned about community safety in the wake of a brutal murder. More than 200 people showed up. Many were forced to listen from the hallway because the room was so crowded. “We don’t feel as safe as we used to,” said Carlsbad resident Charlie Christenson about why he came to the meeting. “I thought it was great to have the forum,” he added. It came more than a week after 64-year-old Marj Gawitt was stabbed to death in her home on Outrigger Lane, a development overlooking the Agua Hedionda Lagoon. Two transients were arrested and charged in the murder. Prosecutors say Gawitt was stabbed 50 times and tortured. Still, she managed to call 911 herself and alert police about her assailants. “I’ve been a police officer in Carlsbad for over 28 years, and to my knowledge this is the firs time in that particular community a crime like that has happened,” said Carlsbad police Chief Neil Gallucci. For two hours, Gallucci and other top police officials fielded questions from residents about the murder and the lingering safety concerns it has brought about.Christenson said he came to ask the chief one question. “I asked him if there were any changes to outreach or enforcement in response to this issue and he said no,” said Christenson. “That was disappointing.” But Gallucci said the meeting itself was necessary to get a feel for the issues. “I think having this meeting was a big step forward,” he said. He wanted to explain to the crowd how they respond to calls and what resources they have to do it. He also emphasized the rare nature of the attack. “We know when a crime like this happens people are worried about things that never have happened in their community before,” said the chief. 1808

  

CAPE CORAL, Fla. — A golfer in Florida didn't exactly "play it as it lies," during a recent round, but he was able to get his ball back after it landed on the back of a large alligator.Kyle Downes of Cape Coral was golfing at Coral Oakes Golf Course when his ball ended up on the back of a large alligator that was sunning itself near a water hazard.While a friend recorded on his phone, Downes slowly approached the gator from behind and was able to snatch the ball before it slithered away into the water.Downes later shared the video of his encounter on Facebook and added that the animal wasn't harmed in any way.This story was originally published by WFTX in Fort Meyers, Florida. 693

  

CALEXICO, Calif. (KGTV) -- U.S. Border Patrol agents arrested an El Salvadoran citizen Wednesday they say is a previously deported sex trafficker.Agents say Gloria Reyes-Lopez, 62, (pictured below) was arrested after Border Patrol agents noticed her illegally enter the United States at the El Centro sector around 7:30 Wednesday night.After her arrest, Reyes-Lopez was taken to the Calexico station for processing.“This individual is a convicted felon who preyed on young, innocent children,” said Assistant Chief Patrol Agent David S. Kim. “The men and women of the U.S. Border Patrol are this country’s first line of defense against threats like this.”Reyes-Lopez will be prosecuted for re-entry after removal, according to authorities. 752

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