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2025-05-25 21:10:24
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  全国治癫痫病专业医院   

Car drives through protesters, Times Square, New York City, Thursday, September 3, 2020 pic.twitter.com/yMadwNYJSI— DataInput (@datainput) September 4, 2020 165

  全国治癫痫病专业医院   

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

  全国治癫痫病专业医院   

CAPE CANAVERAL, Fla. (AP) - NASA launched another of the world's most advanced weather satellites on Thursday, this time to safeguard the western U.S.The GOES-S satellite thundered toward orbit aboard an Atlas V rocket, slicing through a hazy late afternoon sky. Dozens of meteorologists gathered for the launch, including TV crews from the Weather Channel and WeatherNation.GOES-S is the second satellite in an approximately billion effort that's already revolutionizing forecasting with astonishingly fast, crisp images of hurricanes, wildfires, floods, mudslides and other natural calamities.RELATED: NASA's James Webb Space Telescope Launch Might Be Delayed - AgainThe first spacecraft in the series, GOES-16, has been monitoring the Atlantic and East Coast for the past year for the National Oceanic and Atmospheric Administration . The same first-class service is now coming to the Pacific region.Besides the West Coast, Alaska and Hawaii, GOES-S also will keep watch over Mexico and Central America. It will become GOES-17 once it reaches its intended 22,000-mile-high orbit over the equator in a few weeks, and should be officially operational by year's end."We can't wait!" tweeted the National Weather Service in Anchorage just before the rocket soared from Cape Canaveral Air Force Station.RELATED: SpaceX Falcon 9 rocket finally launches after two liftoff delaysThe weather service's Jim Yoe said on NASA TV that he was "really excited" to see his first launch in person."I'm even more excited about the work that's coming up for me and my colleagues, putting these new data to work for better forecasts and warnings for the American public," said Yoe, an official at the Joint Center for Satellite Data Assimilation.With these two new satellites, NOAA's high-definition coverage will stretch from the Atlantic near West Africa, a hotbed for hurricane formation, all the way across the U.S. and the Pacific out to New Zealand.RELATED: Satellite lost by NASA discovered 12 years laterIt's the third weather tracker launched by NASA in just over a year: "three brilliant eyes in the sky," as NOAA satellite director Stephen Volz puts it. GOES-16 launched in late 2016 and an environmental satellite rocketed into a polar orbit from California last November.These next-generation Geostationary Operational Environmental Satellites, or GOES, are "a quantum leap above" the federal agency's previous weather sentinels, Volz said. This is the 18th launch of a GOES since 1975; one was lost in an explosion during liftoff and all but three of the satellites already up there are retired. Rockets by United Launch Alliance, a venture between Lockheed Martin and Boeing, carried all those GOES.Even as it was still being checked in orbit, GOES-16 provided invaluable data to firefighters battling blazes in Texas, Oklahoma and elsewhere last March and to Houston-area rescue teams in the flooded aftermath of Hurricane Harvey last August, according to officials. GOES-16 also observed the uncertain path of Hurricanes Irma and the rapidly intensifying Hurricane Maria in September.RELATED: SpaceX Plans To Bring High-Speed Internet To BillionsGOES-16 "turned out to be better than we expected it to be," said National Weather Service director Louis Uccellini, on hand for Thursday's launch. The satellite wasn't officially on duty yet, "and we were just standing there gawking at the imagery,"As Hurricane Harvey approached the Texas coast, the satellite revealed the clouds sinking in the eye and the eye expanding as the storm morphed from a category 2 to 4, Uccellini said. Those images helped determine when it was safe for rescue teams to go out and save stranded residents, he added.The satellite also alerted authorities in Texas and Oklahoma to the eruption of new blazes even before the 911 calls came in, Uccellini said. He said the satellite also tracked the direction of the fires like never before, prompting first responders to later tell NOAA: "You saved lives."RELATED: Report: NASA Is Planning To Privatize International Space StationTwo more are planned in this four-satellite series: GOES-T in 2020 and GOES-U in 2024. The .8 billion cost includes the development, launch and operation of all four satellites as well as ground systems through 2036. 4290

  

Chi Chi DeVayne, a popular contestant on the reality competition show “RuPaul’s Drag Race,” has died at the age of 34.Entertainment Weekly was one of the first news outlets to confirm the death of the drag queen, whose real name is Zavion Davenport.RuPaul confirmed the news in a statement on Twitter."I am heartbroken to learn of the passing of Chi Chi DeVayne,” wrote the TV show host. “I am so grateful that we got to experience her kind and beautiful soul. She will be dearly missed, but never forgotten. May her generous and loving spirit shine down on us all. On behalf of VH1, World of Wonder and the cast and crew of RuPaul’s Drag Race, I extend my deepest sympathy - from our family to hers."Chi Chi first appeared on season 8 of “Drag Race,” during which the Louisiana native made it to the top four thanks to her infectious personality and ability to design on a dime. She was also on season 3 of “RuPaul’s Drag Race All-Stars.”The queen’s death comes less than a week after she informed her Instagram followers that she was back in the hospital. Over the past several weeks, DeVayne had been battling pneumonia and suspected kidney failure.Several fellow “Drag Race” contestants have taken to social media to mourn the loss. Here's are a few: 1262

  

CARLSBAD, Calif. (CNS) -- Police Friday announced the arrest of a 54-year-old Poway man on suspicion of killing a young woman in Carlsbad 33 years ago.James Charles Kingery was arrested Wednesday in connection with the sexual assault and murder of 26-year-old Julia Hernandez-Santiago, whose body was found on Oct. 10, 1987, on an ivy-covered embankment in the 2100 block of Alga Road, west of Alicante Road, Carlsbad police spokesman Jodee Reyes said.The San Diego County Medical Examiner's Office determined the cause of death was asphyxiation due to strangulation."Investigators were able to recover several pieces of key evidence at the time; however, a suspect was never identified," Reyes said.Over the next three decades, detectives continued to follow leads and technology eventually helped reveal new investigative angles to probe.Last March, San Diego County sheriff's deputies arrested a man on narcotics and weapons violations and took a DNA sample from him, as required by law based on his alleged offenses, Reyes said. Last May, the sheriff's crime lab notified Carlsbad police that the DNA samples from the 1987 murder case were a match for Kingery.Kingery was booked into the San Diego Central jail around 12:30 p.m. Wednesday on suspicion of murder, according to jail records. He was being held without bail pending his arraignment, scheduled for July 31.A motive for the killing has not been disclosed. 1428

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