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普宁哪里可以喝白癜风茶(揭阳白药治白癜风有效吗) (今日更新中)

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2025-05-30 23:24:32
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  普宁哪里可以喝白癜风茶   

NASA's OSIRIS-REx mission and the asteroid Bennu have had a date planned for two years, and just after noon ET today, they finally got to meet face to face. OSIRIS-REx fired its thrusters for a small burn, putting it about 4.3 miles from Bennu, marking the end of its journey to the asteroid.The mission -- which stands for Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer -- is NASA's first asteroid sample return mission. It launched in September 2016 and will spend two years up close and personal with Bennu. First images of the asteroid from the spacecraft's perspective have appeared as it got closer and closer.On Tuesday, the spacecraft will fly within 5 miles of Bennu, which will help design future orbits and map the surface.Over the next year, OSIRIS-REx will survey the asteroid using five scientific instruments on board the spacecraft. These instruments will help it determine a safe location from which to collect a small sample from Bennu's surface that will be returned to Earth in September 2023."Bennu's low gravity provides a unique challenge for the mission," said Rich Burns, OSIRIS-REx project manager at NASA's Goddard Space Flight Center. "At roughly 0.3 mile in diameter, Bennu will be the smallest object that any spacecraft has ever orbited."The sample from Bennu, a near-Earth asteroid, could help scientists understand not only more about asteroids that could impact Earth but about how planets formed and life began.OSIRIS-REx has a camera suite, a laser altimeter for 3D mapping, a thermal emission spectrometer to take temperature and mineral content and spectrometers to measure X-rays, nearly infrared and visible light.An arm mechanism called TAGSAM will reach out to collect the sample from Bennu's surface, making contact with the asteroid for five seconds in July 2020. During this contact, the arm will use a nitrogen gas burst to stir up rock and other materials on the surface so it can capture them. There is enough nitrogen for three attempts if the first is unsuccessful.NASA said the estimated 2.1-ounce sample size equates to about 30 sugar packets worth of dirt and rocks.The arm has a full range of motion, with joints capable of movement comparable to shoulder, elbow and wrist joints. It was "flexed" in space for the first time on November 14."The TAGSAM exercise is an important milestone, as the prime objective of the OSIRIS-REx mission is to return a sample of Bennu to Earth," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "This successful test shows that, when the time comes, TAGSAM is ready to reach out and tag the asteroid."In 2021, it will be time for the spacecraft to essentially turn around and begin its two-year journey home. The sample will be packed into a capsule that will drop in the Utah desert in 2023.For two years after the return, the sample will be cataloged and analyzed. Afterward, 75% of the returned sample will remain at NASA's Johnson Space Flight Center so it can be used for more research by scientists from around the world.Why did NASA select Bennu out of the 780,000 known asteroids in our solar system?It was discovered in 1999, and scientists have been studying it ever since. The asteroid fits a number of criteria that make it intriguing and convenient.Bennu is relatively close to Earth, and its orbit even crosses that of our planet, making a close approach every six years. Though small asteroids can rotate very quickly, Bennu has a diameter just a bit bigger than the height of the Empire State Building and rotates relatively slowly, each 4.3 hours. This means OSIRIS-REx can match its velocity and touch down briefly.The asteroid could pass close to Earth, closer than the moon, in 2135, with even closer approaches possible in 2175 and 2195. A direct hit is unlikely, but the data gathered during this mission can help determine the best ways to deflect near-Earth asteroids.The asteroid is also old and well-preserved, full of valuable materials that may even contain clues about how life began. Bennu is essentially a leftover from the formation of our solar system billions of years ago, although some of the minerals inside it could be even older.This carbon-rich asteroid could be full of organic molecules, metals, platinum and even water -- the essential ingredients for life. It's because of objects like Bennu that these resources were delivered to Earth during its formation.Asteroids could even serve as fuel stations for robotic and human missions if we can unlock the hydrogen and oxygen inside them, NASA said.Bennu probably broke off of a larger asteroid in the asteroid belt between Mars and Jupiter a couple billion years ago. This knocked it through space until an orbit close to Earth locked it in place. And Bennu is believed to be a grouping of rocks held together by gravity rather than a single object.But its orbit drifts 0.18 miles each year toward the sun, and OSIRIS-REx will enable researchers to understand why and to predict Bennu's movements. This could also explain how it ended up as a near-Earth asteroid."The story of this asteroid is the story of the solar system," said Bashar Rizk, instrument scientist for OSIRIS-REx. "When we understand Bennu, we will understand something fundamental about our solar system."The-CNN-Wire 5356

  普宁哪里可以喝白癜风茶   

MILWAUKEE — Surveillance video captured two porch pirates on a casual morning stroll. But what they don't know is that the owner of the package they're about to steal actually wants it to get taken. "Usually I get very mad when I see the package get stolen, but now this one I was like proud to show the video," said Jamie, who left a package of sweet revenge on her Milwaukee porch.Out of fear of retaliation, Jamie asked that her identity be concealed and to only use her first name. She says they've had about eight packages stolen from their front porch and have tried everything to fight back. They installed security cameras, asked for signed deliveries and even had items placed behind a fence. But somehow the thieves continued to be successful. Eventually, they decided to have everything delivered to work, but after a gift sent to her a month ago was stolen as well, she decided that was enough. "That's when we ordered the next package," she said. "We went on to a website that does anonymous deliveries and you can pick from all sorts of different fecal matter. The cheapest one is cow, we decided to go in full blast and we chose gorilla." The thieves didn't like what they had scooped up, and ended up tossing the item into a neighbor's yard. But they aren't the only thieves she's caught on camera. Video also shows a woman stealing that gift someone sent Jamie, that contained memorial stickers honoring her late father. "She threw it because it wasn't anything important to her but to me that was the most important package that had been taken off our porch," said Jamie. A neighbor ended up finding the discarded stickers in a nearby park. Jamie says she's tried to report the thefts to police, but she's been told it's a lost cause and the chances of catching these criminals are slim. So she hopes a little package payback will prevent thefts in the future. "We do live in a nice neighborhood," she said. "It's a nice a street, they're nice neighbors, we just don't know why it keeps happening to us."  2106

  普宁哪里可以喝白癜风茶   

Millions of small, black cerith snails cover one area of Fort De Soto Beach, Florida, stunning wildlife lovers. The shellfish, known as cerith snails, cover nearly the entire length of the beach. Robert Neff snapped several pictures of the bizarre event. “I grew up in Florida and I’ve never seen anything like this. It was amazing to see,” he said.What makes this so odd is Cerith snails don’t typically wash up onto land. They’re usually along the bottom of the ocean in flat reefs or hiding in coral reefs where the temperature is warm. The snails are in an area off the south end of the parking lot at Fort DeSoto’s North beach, which borders the bird sanctuary. Neff said the low tide exposed the snails over the weekend, and many are still at the beach. His photographs, along with video taken by Mark Freels of See Through Adventures, have been widely shared across social media. One former research assistant from the Georgia Sea Turtle Center said it's possible the snails came to the shallow waters because they found food, which was washed up by recent hurricanes, on the beach. Freels said it was a very strange and magnificent sight.“My job is to take people on kayak adventures and you never know what you’ll find. This was very interesting to see,” he said. 1330

  

NBC News and PBS report that the Trump administration will end funding to 13 COVID-19 testing sites in five states at the end of June.According to PBS reporter Yamiche Alcindor, the testing sites are located in Illinois, New Jersey, Colorado, Pennsylvania, and Texas.Reports of the administration's decision came a day after the U.S. reported 34,700 new cases of the virus — the third-highest single-day increase of new cases since the pandemic began.The reports also come after days of contradicting messaging regarding testing within the administration. At a rally in Tulsa on Saturday, President Donald Trump said that he had ordered health experts to "slow down" testing to limit the number of newly reported infections.On Monday, Press Secretary Kayleigh McEnany said during a press briefing that Trump made those comments "in jest." Trump contradicted McEnany's assertion on Tuesday when asked about his comments, adding that he "doesn't kid."Also on Tuesday, Dr. Anthony Fauci and other top health officials in the White House said they had not been directed to slow down testing.Health experts widely agree that increased testing capacity is a key tenet in slowing and preventing the coronavirus' spread. 1220

  

MILWAUKEE, Wis. -- A Wisconsin man is accused of driving across Milwaukee with the body of a man who had fatally overdosed in the passenger seat for 13 hours straight.The Washington County Sheriff’s Office said Thursday it has arrested the 34-year-old man in connection to the death of the victim, whose lifeless body was later found in the Allenton Marsh.The sheriff’s office says the suspect, whom they did not name, was last seen with the victim, 30-year-old Stephen Lombard, in the Village of Jackson on July 27.A missing persons investigation was launched with the assistance of the Wisconsin Division of Criminal Investigations.A several-month-long investigation eventually concluded that on the night of July 27, Lombard and the suspect were in Milwaukee using illegal narcotics.Investigators believe that at some time, Lombard stopped breathing while inside the suspect’s vehicle. The suspect did not seek medical aid, authorities say, and Lombard died from a probable drug overdose.The suspect then drove around Milwaukee with Lombard's body still in the passenger seat for the next 13 hours. During that time, the suspect used the victim's debit card at several locations, authorities say.Investigators believe the suspect then discarded Lombard’s body on July 28 in the Allenton Marsh, off CTH W, north of CTH S in the Town of Addison.That's where authorities found a body they believe to be Lombard's.DNA analysis will be required for positive identification. An autopsy was completed and the results are pending, the Washington County Sheriff’s Office says.“It is unconscionable to think that someone would have such wanton disregard for human life to not seek medical attention for someone in need," said Washington County Sheriff Martin Schulteis in a statement."It shocks the conscience to think that they would then drive around with the body for thirteen hours while emptying the victim’s bank account and eventually discarding the body like a piece of trash," he said. 1995

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