太原什么是混合痔(山西医院治疗痔疮多少钱) (今日更新中)

SpaceX completed the last big test of its crew capsule before launching astronauts in the next few months, mimicking an emergency escape shortly after liftoff Sunday.No one was aboard for the wild ride in the skies above Cape Canaveral, just two mannequins. The nine-minute flight ended with the Dragon crew capsule parachuting safely into the Atlantic, after separating and speeding away from the exploding rocket.“I’m super fired up,” Elon Musk, the company’s founder and chief executive, told reporters. “It’s just going to be wonderful to get astronauts back into orbit from American soil after almost a decade of not being able to do so. That’s just super exciting.”NASA astronauts have not launched from the U.S. since the space shuttle program ended in 2011. Musk and NASA Administrator Jim Bridenstine said the next Crew Dragon could launch with a pair of NASA astronauts in the second quarter of this year — as early as April.The Falcon 9 rocket blasted off as normal, but just over a minute into its supersonic flight, the Dragon crew capsule catapulted off the top 12 miles (20 kilometers) above the Atlantic. Powerful thrusters on the capsule propelled it up and out of harm’s way, as the rocket engines deliberately shut down and the booster tumbled out of control and exploded in a giant fireball. The capsule reached an altitude of about 27 miles (44 kilometers) before parachuting into the ocean just offshore to bring the test flight to a close. Everything appeared to go well despite the choppy seas and overcast skies. Within minutes, a recovery ship was alongside the capsule.Recycled from three previous launches, the SpaceX rocket was destroyed as it burst apart in flight and slammed in pieces into the sea. SpaceX normally tries to recover its boosters to drive down launch costs, landing them upright on a floating platform or back at the launch site.NASA’s commercial crew program manager, Kathy Lueders, said the launch abort test was “our last open milestone” before allowing SpaceX to launch Doug Hurley and Robert Behnken to the International Space Station. Their launch date will depend, in part, on whether NASA decides to keep them for months at the orbiting lab, versus just a week or two. A longer mission will require more training before flight.The astronauts monitored Sunday’s flight from the firing room. Hurley said it was “pretty neat to see” the capsule aboard the recovery ship within two hours. By all early accounts, the test was successful.“We’ll see what the data show and go from there,” Hurley said. “But it certainly is a confidence builder from the standpoint if you ever got into that situation, that Dragon can get us away from the booster quickly.”The astronauts also will have access to speed before liftoff. During a launch dress rehearsal Friday, Hurley and Behnken rode in a white Tesla Model X from Kennedy Space Center’s crew quarters to the launch pad, their sleek white and black spacesuits matching the electric sports car with wing-like doors. Musk, who also runs Tesla, used the cars to get around the space center Sunday.Delayed a day by bad weather, Sunday’s launch from Kennedy brought together hundreds of SpaceX, NASA and Air Force employees on land, at sea and in the air. Tourists and locals alike packed the adjoining visitor complex and nearby beaches to see the dramatic fiery spectacle of an out-of-control rocket. Musk brought along his own family, including his brother.NASA hired SpaceX and Boeing a decade ago to transport astronauts to and from the space station for billions of dollars. Both companies struggled with technical problems, adding years of delay and forcing NASA to shell out hundreds of millions of dollars extra for Russian rocket rides.After multiple cargo deliveries for NASA, SpaceX successfully flew an enhanced crew capsule to the space station last March without anyone on board, but it exploded a month later during ground testing. The emergency escape thrusters — the kind used in Sunday’s test — had to be retooled. In all, SpaceX has tested these powerful Super Draco thrusters some 700 times.Last month, meanwhile, Boeing’s Starliner crew capsule ended up in the wrong orbit on its first test flight and had to skip the space station. The previous month, only two of the Starliner’s three parachutes deployed during a launch abort test.Lueders said it’s too soon to know whether Boeing will need to send another Starliner to the space station without a crew or go straight to launching astronauts later this year. An investigation team is still looking into why the Starliner’s automated timer was off by 11 hours during the December test flight.The importance of launch escape was demonstrated in 2017 when two astronauts, an American and a Russian, were pulled to safety during a failed launch from Kazakhstan. They experienced up to seven times the force of gravity during the abort, but walked away from the accident.The SpaceX in-flight abort system, Musk pointed out, should be gentler for the crew and is good from the launch pad all the way to orbit.Musk said the Dragon’s escape system should work — in principle — even if the capsule is still attached when the rocket erupts in a fireball. He said that could look like “something out of ‘Star Wars’” with the capsule flying right out of a fireball.“Obviously we want to avoid doing that,” he quickly added, taking note of all the NASA personnel around him.___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content. 5629

Sadly, many states and organizations are curtailing summer camps to stop the spread of COVID-19. While a traditional summer camp might not be an option for you, with some planning and creativity, there's still plenty of options and plenty of things you can do to bring the summer camp to you.Naomi Colliver is a mom who confronts summer head on. For the past six years, she's held her own summer camp. She even created a spreadsheet of weekly themes with activities, games, food ideas, and themed educational videos. “I knew that if we didn’t have some sort of structure, we would watch TV all day and easily get sucked in,” Colliver said. “We’re doing a traveling with the band week; we picked 5 different cities that have different styles of music, we’re going to learn about the city listen to the music, make some instruments.”It all started when she would post the things she would do with her kids on Instagram. “As the young-ins do, they hashtag everything,” Colliver said.On a whim, Colliver began using the hashtag #CampColliver on social media. The Camp Colliver name stuck. Colliver said friends “would constantly call me out and say what’s happening at camp Colliver today when can I drop my kid off at Camp Colliver? I’m not taking any more I’m just sharing what we’re doing.” Some of the things they're doing include a “mess-tival,” like festival, but a huge mess. She even fills a baby pool with spaghetti.At-home option for parentsBut if you're not the kind of parent with a Google Doc summer camp, try 1531

SOUTH BEND, Ind. — Firefighters in South Bend, Indiana, saved a pair of raccoons from a warehouse fire that started Sunday night. The raccoons were stuck on the roof of the warehouse when the fire broke out, but the ladders set up by firefighters allowed them to escape the smoke.Video posted by the South Bend Fire Department shows two ladders propped against a warehouse on Calvert and Franklin streets in South Bend. The raccoons can be seen safely descending as kids watching nearby erupt into cheers as the two furry creatures leap to the ground. The structure fire started Sunday night but hot spots reignited it Monday, according to 652

Senate Majority Leader Mitch McConnell on Monday blocked efforts by his Democratic counterpart to pass via unanimous consent a resolution to make public special counsel Robert Mueller's report, the second time Senate Minority Leader Chuck Schumer has tried to do so.McConnell objected this time saying he wants to give Attorney General William Barr and Mueller time to complete their investigations and because Barr has committed to make as much of the report public, but he shouldn't be rushed."It's not unreasonable to give the special counsel and the Justice Department just a little time to complete their review in a professional and responsible manner," McConnell said on the Senate floor. "Remember, as I said earlier, we're likely dealing here with potential other prosecutions, classified information, damaging people's reputation. There's no evidence that the attorney general is not going to produce as much information as possible for all of us, and that's why I objected. I think it's a reasonable thing to do."Schumer criticized McConnell's objections, saying Republicans support the language in his resolution."This language was good enough for every Republican in the Senate as well as every Democrat," Schumer said following McConnell remarks. "The President himself says it should be released. It's hard to understand why the majority leader should stand alone with objections no one else found to be reasonable or sustainable and oppose this resolution. The report should be made public and the Senate should resolve that it should be."This same resolution 1588

Sharks are known to stalk and sniff out prey before they attack. But all this newly discovered shark species has to do is glow in the dark, and the prey comes to them.The 5 1/2-inch American Pocket Shark is the first of its kind to be discovered in the Gulf of Mexico, according to a new 299

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