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昌吉二十多割包茎正常吗
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发布时间: 2025-05-26 10:20:30北京青年报社官方账号
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  昌吉二十多割包茎正常吗   

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

  昌吉二十多割包茎正常吗   

Can you imagine a pile of trash twice the size of Texas? That's what's floating in the Pacific Ocean right now.A group started an ambitious project to clean it up.Boyan Slat, founder of The Ocean Cleanup, has waited five years to see his idea put into action. That idea consists of a 2,000-foot long barrier, with a 10-foot skirt below that’ll help get plastic out of the ocean.“2,000 feet is a pretty big clean up system, and just imagining that the future one will probably be you know maybe twice as large,” says Slat.It's work starts at the Great Pacific Garbage Patch--an area between California and Hawaii--with a pile of trash three times the size of France.  “You go out there, it's all blue. The thing is you're all miles away from any human activity and you start to see like objects that you can see in your kitchen,” says Laurent Lebreton, lead oceanographer. “So, it's just very striking like you wouldn't expect.”The system will corral the plastic floating on the surface, so fish and other ocean life can swim underneath. Then, smaller boats take the plastic back to shore for recycling. The Ocean Cleanup says it can extract 50 percent of the plastic in the patch every five years.  “That's a huge goal,” says Dr. Mikki McColb-Kobza, with Ocean First Institute. “If they are able to do that, I think that is a really big dent into the problem.”Dr. McColb-Kobza says the system is meeting an unaddressed need.  “There really haven't been a lot of other projects trying to go out and bring trash bag to try and figure out a way to bring it back,” he says.  Still, some say the system creates a false sense of security, and more focus should be placed on keeping plastic out of the ocean to begin with.  But Dr. McColb-Kobza says the project is a great way to get that conversation started.  “Really the key is not only to clean up what is there, but it's to think about why you know do we live in this plastic throw a way society.”   1990

  昌吉二十多割包茎正常吗   

Channing Tatum is releasing his first children's book called "The One and Only Sparkella."The actor announced the news along with a photo of himself with the book on Twitter."I don’t know about you but things got a little weird for me in quarantine," Tatum tweeted. "I locked myself in my daughter’s room & found my inner child. So this is what I created for my little girl. From what is, I guess, the little girl in me. Thx for reading. #Sparkella." 462

  

Charges have been dropped against the man accused of criminal homicide in the Opry Mills shooting.Chaos ensued when 22-year-old Justin Golson?shot at?22-year-old?Demarco Churchwell, who was taken to Skyline Medical Center in critical condition where he later died.Immediately after the shooting, Golson ran from the mall to a ticketing booth outside, placed his gun on the counter, and told the people inside to call 911. He told detectives he acted in self-defense after being threatened over social media by the victim and his friends.The mall was evacuated as police secured the area and investigated the incident.Court records show Golson's charge of criminal homicide was dismissed on Monday, July 30. 729

  

CARLSBAD, Calif. (KGTV) – The Carlsbad Police Department held a community meeting to address a creeper that’s been prowling through neighborhoods.RELATED: Carlsbad Police release sketch of suspected prowler who entered homes on occasionAbout 50 people attended the Thursday night meeting at the Carlsbad Senior Center.Police passed out the sketch of the man they say has been looking through people’s windows and then climbing through the glass.In one case, the prowler climbed into a teenager’s window but ran off when the girl woke up and started screaming.Police say the incidents happened between Sept. 11 and Sept. 16.  In all cases, police say the man went in through an unlocked window on the ground floor. 731

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