吉林包皮龟头发炎要多少钱治(吉林包皮手术需要做哪些检查) (今日更新中)

A Japanese space probe has successfully fired a "bullet" into an asteroid as part of a mission to collect rock samples from the celestial body.The projectile disturbed material from the exterior of asteroid Ryugu which then floated from its surface due to the weak gravitational field.These particles were successfully collected by the probe, according to Japan's space agency JAXA, which announced that the Hayabusa 2 craft had successfully touched down on on the asteroid on Friday morning Japanese time.JAXA scientists had expected to find a powdery surface on Ryugu, but tests showed that the asteroid is covered in larger gravel.As a result the team had to carry out a simulation to test whether the projectile would be capable of disturbing enough material to be collected by what scientists call a "sample horn," which protrudes from the underside of the probe.This video shows the success of a December 28 test, which green-lit the asteroid landing.The team is planning a total of three sampling events over the next few weeks.Hayabusa 2 will depart Ryugu in December 2019 and return to Earth by the end of 2020 with its precious cargo of samples, which will be analyzed by scientists such as John Bridges, a professor of planetary science at the University of Leicester, UK.Bridges, who was also involved in the first Hayabusa mission, told CNN via telephone on Thursday that the event was "nail-biting stuff" due to the extreme precision involved in landing on Ryugu."This is a significant mission," said Bridges. "Sample return missions are particularly exciting."He told CNN that the Hayabusa 2 mission is interesting because Ryugu is a C-class asteroid which humans haven't visited before."One thing I'm pretty sure of is that it will throw up some unexpected results," said Bridges, who believes that information from Ryugu samples could make us think again about the early evolution of the solar system.Beneath their desolate surface, asteroids are believed to contain a rich treasure trove of information about the formation of the solar system billions of years ago.C-type asteroids, which are largely composed of carbon, are the most common variety of asteroids, comprising more than 75% of those currently discovered. The other two main types of asteroid are the metallic S- and M-types, according to NASA.Ryugu is expected to be "rich in water and organic materials," allowing scientists to "clarify interactions between the building blocks of Earth and the evolution of its oceans and life, thereby developing solar system science," JAXA said.If Hayabusa 2 makes it back to Earth on schedule it will be the first mission to bring back samples from a C-class asteroid.JAXA scientists are currently racing NASA for that historic achievement, with the US agency's own sample retrieval mission due to arrive back on Earth in 2023.Even reaching the asteroid is a massive achievement as it is the equivalent of hitting a 6-centimeter (2.4-inch) target from 20,000 kilometers (12,400 miles) away."In other words, arriving at Ryugu is the same as aiming at a 6-centimeter target in Brazil from Japan," said JAXA.The-CNN-Wire? & ? 2019 Cable News Network, Inc., a Time Warner Company. All rights reserved. 3233

A drug that curbs delusions in Parkinson’s patients did the same for people with Alzheimer’s disease and other forms of dementia in a study that was stopped early because the benefit seemed clear.If regulators agree, the drug could become the first treatment specifically for dementia-related psychosis and the first new medicine for Alzheimer’s in nearly two decades. It targets some of the most troubling symptoms that patients and caregivers face — hallucinations that often lead to anxiety, aggression, and physical and verbal abuse.Results were disclosed Wednesday at a conference in San Diego.“This would be a very important advance,” said one independent expert, Dr. Howard Fillit, chief science officer of the Alzheimer’s Drug Discovery Foundation.Although the field is focused on 801

"Happy anniversary, my love. I can't wait to see you again," 34-year-old Ian Stewart told his wife, Katie, as they said their goodbyes at 150

View this post on Instagram Today is Chula Vista's Starlight Parade! I can't go since I have a good amount of work this weekend. If you're like me and going to stay in click the link in the bio to check out last weeks Canine Christmas episode of Holiday Gingerbread Showdown! And don't forget these next two Sundays six other competitors will compete to land a spot in the finale! (Finale is December 22nd) #chulavista #sandiego #starlightparade #thirdavenue #downtownchulavista #holidaygingerbreadshowdown #gingerbreadshowdown #gingerbread #mexicanfiesta #posada #thinkchulavista A post shared by Mmm...Cakes by Jose Barajas (@mmmcakesbyjosebarajas) on Dec 7, 2019 at 7:13am PST 720

A container of screws that fell off a vehicle and littered the roadway in Jackson County, Mississippi, caused flat tires along nearly 30 miles of interstate.Mississippi Highway Patrol responded Tuesday after getting numerous calls about stranded motorists near the Pascagoula River Bridge. When officers arrived, they discovered sheet metal screws scattered across Interstate 10 West. In total, 36 passenger cars and three semis each had multiple flat tires."Wrecker response time was upwards to three hours for [motorists] waiting on tow trucks due to the number of calls for service," the Mississippi Highway Patrol said in a statement."Troopers assisted [motorists] with changing flat tires and providing lane safety" for those who were stranded.Courtney Beauvais was on her way home to Ocean Springs when she noticed that she had a flat. Her car was equipped with run-flat tires, designed to resist deflation when punctured, so she was able to exit the highway and make it home."I noticed the car wobble a little bit when I exited," she said. "When I got home, I noticed screws in the side wall and in the bottom of the front tire."She now has to get a new tire for her car."I didn't think anything of it when I got the flat tire," she said. "Once I saw the pictures on Facebook when I got home, I was like, 'oh, my goodness.' "Luckily, the flat tires didn't cause any wrecks. By Tuesday evening, the Mississippi Department of Transportation had cleaned up the area and traffic was running smoothly. 1515

来源：资阳报