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呼和浩特特色肛肠科医院
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发布时间: 2025-06-03 02:49:16北京青年报社官方账号
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  呼和浩特特色肛肠科医院   

CAPE CANAVERAL, Fla. (AP) — Mars is about to get its first U.S. visitor in years: a three-legged, one-armed geologist to dig deep and listen for quakes.NASA's InSight makes its grand entrance through the rose-tinted Martian skies on Monday, after a six-month, 300 million-mile (480 million-kilometer) journey. It will be the first American spacecraft to land since the Curiosity rover in 2012 and the first dedicated to exploring underground.NASA is going with a tried-and-true method to get this mechanical miner to the surface of the red planet. Engine firings will slow its final descent and the spacecraft will plop down on its rigid legs, mimicking the landings of earlier successful missions.That's where old school ends on this billion U.S.-European effort .Once flight controllers in California determine the coast is clear at the landing site — fairly flat and rock free — InSight's 6-foot (1.8-meter) arm will remove the two main science experiments from the lander's deck and place them directly on the Martian surface.No spacecraft has attempted anything like that before.The firsts don't stop there.One experiment will attempt to penetrate 16 feet (5 meters) into Mars, using a self-hammering nail with heat sensors to gauge the planet's internal temperature. That would shatter the out-of-this-world depth record of 8 feet (2 ? meters) drilled by the Apollo moonwalkers nearly a half-century ago for lunar heat measurements.The astronauts also left behind instruments to measure moonquakes. InSight carries the first seismometers to monitor for marsquakes — if they exist. Yet another experiment will calculate Mars' wobble, providing clues about the planet's core.It won't be looking for signs of life, past or present. No life detectors are on board.The spacecraft is like a self-sufficient robot, said lead scientist Bruce Banerdt of NASA's Jet Propulsion Laboratory."It's got its own brain. It's got an arm that can manipulate things around. It can listen with its seismometer. It can feel things with the pressure sensors and the temperature sensors. It pulls its own power out of the sun," he said.By scoping out the insides of Mars, scientists could learn how our neighbor — and other rocky worlds, including the Earth and moon — formed and transformed over billions of years. Mars is much less geologically active than Earth, and so its interior is closer to being in its original state — a tantalizing time capsule.InSight stands to "revolutionize the way we think about the inside of the planet," said NASA's science mission chief, Thomas Zurbuchen.But first, the 800-pound (360-kilogram) vehicle needs to get safely to the Martian surface. This time, there won't be a ball bouncing down with the spacecraft tucked inside, like there were for the Spirit and Opportunity rovers in 2004. And there won't be a sky crane to lower the lander like there was for the six-wheeled Curiosity during its dramatic "seven minutes of terror.""That was crazy," acknowledged InSight's project manager, Tom Hoffman. But he noted, "Any time you're trying to land on Mars, it's crazy, frankly. I don't think there's a sane way to do it."No matter how it's done, getting to Mars and landing there is hard — and unforgiving.Earth's success rate at Mars is a mere 40 percent. That includes planetary flybys dating back to the early 1960s, as well as orbiters and landers.While it's had its share of flops, the U.S. has by far the best track record. No one else has managed to land and operate a spacecraft on Mars. Two years ago, a European lander came in so fast, its descent system askew, that it carved out a crater on impact.This time, NASA is borrowing a page from the 1976 twin Vikings and the 2008 Phoenix, which also were stationary and three-legged."But you never know what Mars is going to do," Hoffman said. "Just because we've done it before doesn't mean we're not nervous and excited about doing it again."Wind gusts could send the spacecraft into a dangerous tumble during descent, or the parachute could get tangled. A dust storm like the one that enveloped Mars this past summer could hamper InSight's ability to generate solar power. A leg could buckle. The arm could jam.The tensest time for flight controllers in Pasadena, California: the six minutes from the time the spacecraft hits Mars' atmosphere and touchdown. They'll have jars of peanuts on hand — a good-luck tradition dating back to 1964's successful Ranger 7 moon mission.InSight will enter Mars' atmosphere at a supersonic 12,300 mph (19,800 kph), relying on its white nylon parachute and a series of engine firings to slow down enough for a soft upright landing on Mars' Elysium Planitia, a sizable equatorial plain.Hoffman hopes it's "like a Walmart parking lot in Kansas."The flatter the better so the lander doesn't tip over, ending the mission, and so the robotic arm can set the science instruments down.InSight — short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport — will rest close to the ground, its top deck barely a yard, or meter, above the surface. Once its twin circular solar panels open, the lander will occupy the space of a large car.If NASA gets lucky, a pair of briefcase-size satellites trailing InSight since their joint May liftoff could provide near-live updates during the lander's descent. There's an eight-minute lag in communications between Earth and Mars.The experimental CubeSats, dubbed WALL-E and EVE from the 2008 animated movie, will zoom past Mars and remain in perpetual orbit around the sun, their technology demonstration complete.If WALL-E and EVE are mute, landing news will come from NASA orbiters at Mars, just not as quickly.The first pictures of the landing site should start flowing shortly after touchdown. It will be at least 10 weeks before the science instruments are deployed. Add another several weeks for the heat probe to bury into Mars.The mission is designed to last one full Martian year, the equivalent of two Earth years.With landing day so close to Thanksgiving, many of the flight controllers will be eating turkey at their desks on the holiday.Hoffman expects his team will wait until Monday to give full and proper thanks.___The Associated Press Health & Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education. The AP is solely responsible for all content. 6433

  呼和浩特特色肛肠科医院   

CAMP PENDLETON, Calif. (KGTV) - Marines and Sailors are finding and rendering WWII bombs safe in the Republic of Palau.Back in September of 1944, the U.S. attacked Peleliu, an island in the Pacific Ocean. It was Japan's second line of defense in WWII and a hop away from the Philippines."There was a lot of casualties in the Battle of Peleliu, which is one of the islands here in Palau," First Class Navy Diver Alexander Grun said.About 1,500 U.S. and 11,000 Japanese soldiers died in that battle, but the war is still taking casualties today."One of the Palauans was telling me they were building a house and they accidentally hit one [a bomb] while they were building their house," Grun said.Dozens of bombs were left on the islands only to be discovered decades later, often by accident.The U.S. hand picked about 100 Marines and Sailors, many from Camp Pendleton and 3rd Marine Aircraft Wing in San Diego, for Task Force Koa Moana, which translates to Ocean Warrior.One of the missions of the task force is to find and render those bombs safe."We have robots that are able to search the beach for us now." Grun said they search as deep as 40 feet in the ocean for these bombs.They arrived July 21 and, according to Grun, found six bombs on the beach."We were able to recover three of them, but three were mines, Japanese mines, that we didn't want to mess with. They were too big," Grun said.The team flagged the bombs' location and will come back on future missions with more equipment to recover them. Grun said when they find a bomb, they deactivate it or, "if it's going to detonate, we make sure everyone's away and do a hard pull. If it detonates, it detonates, if not, they go through a whole procedure and render it safe."They hope to protect Palauans and get home safe to their families."I want to say hello to my family out in San Diego in El Cajon," 1st. Lt. Joseph Sporleder, Communications Officer said. He has a brand new baby and wants to tell his wife and children he loves them.Sporleder said the island is rich with history and it has been incredible seeing old tanks, railway embedded in coral and other remnants of the war.Grun also had a message to his family in Santee, "I love you guys and I'll be home soon."According to the Marines' website, the task force will leave Palau in September. 2324

  呼和浩特特色肛肠科医院   

By HALELUYA HADERO Associated PressA group in North Carolina has erected a Black Lives Matter billboard to counter a Confederate flag that stands along a road in the state. An official with a group that supported the project says the sign was unveiled in Pittsboro and funded by residents in the city. A GoFundMe page to raise money for the sign said the billboard was a way to show Confederate flags "do NOT represent" Pittsboro. Sam White had been leasing the billboard on his property to an outdoor advertising company. 531

  

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

  

CARMEL VALLEY, Calif. (KGTV) — North County fans of Salt & Straw will soon have another option to grab a scoop closer to home.The ice cream parlor's second San Diego location is set to open at Carmel Valley's One Paseo development on Friday, March 22, a spokesperson told 10News. The first 100 guests will also get a custom Salt & Straw tote bag at the opening.Known for its unique flavors that have already attracted fans to its first San Diego stop in Little Italy, Salt & Straw has scooped out a niche as a popular small-batch ice cream shop. RELATED: Shake Shack opens third San Diego stop at Carmel Valley's One Paseo development"Designed in collaboration with Andee Hess of Portland-based Osmose Design, the new scoop shop features custom design details that recall a modern-day mercantile, offering a welcoming setting to gather within One Paseo," the company said in a release. "A large exterior hand-painted mural of an ice cream cone incorporates Salt & Straw’s signature striped motif — a nod to the company’s origins as a red-and-white striped ice cream cart."In San Diego, customers can find custom local flavors such as Peanut Butter Stout with Chocolate Chicharrón featuring Belching Beaver Brewery’s peanut butter milk stout, and James Coffee and Bourbon featuring coffee from local roasters James Coffee Co.At One Paseo, the shop will debut two new dairy-free flavors: Freckled Mint TCHO-colate Chip and Dandelion Chocolate Hazelnut Cookies & Cream.As if that wasn't enough for customers to choose from, a special menu of themed flavors will rotate monthly. In March, their “The Flavor Vault” will include Pots of Gold & Rainbows, Wild-Foraged Berry Slab Pie, Smoked Sea Salt & Chocolate Crack, Cupcake Royale’s Salted Caramel Cupcake and Silencio Black Tea & Coconut Stracciatella.The One Paseo shop is located at 3705 Caminito Court, Suite 0580, and will be open from 11 a.m. to 11 p.m., daily. 1953

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