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郑州飞秒激光手术哪家好
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发布时间: 2025-05-23 22:10:04北京青年报社官方账号
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  郑州飞秒激光手术哪家好   

After no one won Friday's giant Mega Millions lottery, the jackpot for Tuesday's drawing has climbed to an estimated .6 billion, marking an all-time record for lottery drawings in the US. In case you want to confirm that you did not win during Friday's billion drawing.The winning numbers on Friday were 65-53-23-15-70 and the Mega Ball was 7.Only one other jackpot in U.S. history has surpassed the billion mark. That jackpot was via the Powerball lottery on Jan. 13, 2016, and that drawing was worth .586 billion. In that instance, three winners split the massive jackpot. The Mega Millions jackpot has been building since July 27 when a winning ticket was sold in California. Mega Millions is played in all states except Hawaii, Alaska, Nevada, Utah, Mississippi and Alabama. The odds of drawing all six numbers in Mega Millions are 1 in nearly 302 million. Although no one matched every single number, you could still be a winner. Selecting the Mega Ball is worth . If you get all five white numbers correct without hitting the Mega Ball, a ticket is worth million. Mega Millions is not the only lottery out there that is large.. Powerball's jackpot on Saturday is a slightly more modest 0 million.Take a look at the list below for the largest jackpots in U.S. history, according to the Arizona Lottery: 1363

  郑州飞秒激光手术哪家好   

According to a recent paper, the Earth is caught directly in the crosshairs of a cosmic hurricane.A swarm of nearly 100 stars, accompanied by an even greater amount of dark matter, is aimed directly at our stellar neighborhood and there's nothing we can do to stop it; in fact, the vanguard is already upon us. This sounds like a perfect summer blockbuster movie, starring The Rock and Chris Pratt, or maybe Scarlett Johansson and Charlize Theron.Except this is for real. But is it a danger? Well, actually, no. Not at all. But it's potentially incredibly fascinating, with lots of interesting scientific interconnections. So, what is really going on?The story starts last April, when the Gaia satellite announced the locations and trajectories of 2 billion stars in the vicinity of the Milky Way surrounding our sun. They released the data to the public.Scientists were then able to look at the data set to see if they could spot anything peculiar. In galaxies like the Milky Way, the most common behavior is that the stars orbit the center of the galaxy in a manner broadly similar to the planets orbiting our sun. However, there are some stars that exhibit unusual motion. About a year ago, astronomers identified some "stellar streams" passing through our celestial neighborhood.One of them, called S1 (for stream 1), consists of nearly 100 stars of similar age and composition, orbiting the Milky Way in a direction exactly opposite that of normal stars. It's kind of like a handful of cars driving the wrong way down the highway, except with a much greater distance between them and with no likelihood of a collision. These stars are spread out over a few thousand light years and they will pass through the solar system's neighborhood over the course of a few million years.Astronomers identified S1 as being part of the remnants of a dwarf galaxy that collided with the Milky Way and was consumed in an epic episode of cosmic cannibalism. Dwarf galaxies are very small, typically about 1% the mass of the Milky Way. They can orbit larger galaxies and collide with the bigger galaxy, adding their mass to the parent. This is what appears to have happened in the case of S1, although the process has taken probably a billion years.Dwarf galaxies often have a disproportionately large fraction of dark matter. Dark matter is a hypothetical and still-undiscovered form of matter that interacts only gravitationally. Scientists have proposed its existence to explain many astronomical mysteries, for example the observation that most galaxies rotate faster than can be explained by the known laws of physics and the stars and gas of which they are composed.While dark matter has not yet been observed, hypothesizing its existence is the simplest and most economical explanation for myriad astronomical mysteries. Averaged over the entire universe, dark matter is thought to be five times more prevalent than the ordinary mass of stars and gas and planets.In dwarf galaxies, the fraction of dark matter is often higher. In Fornax, a well-studied dwarf galaxy orbiting the Milky Way, researchers estimate that the dark matter is between 10 and 100 times greater than the mass found in its stars.If that number holds for S1, the dark matter of the S1 stream is passing through the Earth at a much higher velocity than the more ordinary dark matter that orbits the Milky Way -- about twice as fast. It is thought that S1 dark matter is flying through the solar system at a speed of about 550 km/s, or about 1.2 million mph. While these numbers are impressive, they are misleading. Dark matter, if it exists, is extremely diffuse and it will have no discernible effect on the solar system.Because dark matter hasn't been observed yet, these velocity numbers are speculative, although they are strongly supported by a very large body of evidence. However, the prospect of high velocity dark matter flying through the Earth has suggested an opportunity to detect it.In a paper in the prestigious journal Physical Review D, researcher Ciaran O'Hare and his collaborators calculated the possibilities of discovering dark matter using both existing and proposed dark matter detectors. They considered two varieties of dark matter particles: a very heavy kind called a WIMP (weakly interacting massive particle) and a very light kind called an axion. Because the ultimate nature of dark matter is not known, it is important to be open to all possibilities.They found that the detectors they evaluated could find WIMPs for certain ranges of the particle mass. However, when they looked at the axion possibility, it appeared the prospects were even better. Because of its light mass and the manner in which an axion would interact with the detector, the apparatus simply has a better chance of seeing the axion. (If axions exist, of course.)Experiments with names like ADMX, MADMAX and ABRACADABRA are able or will be able to search for the signatures of dark matter proposed in the recent paper. They consist of technologies that are designed to interact with axions in a strong magnetic field and convert them to ordinary microwaves or radio waves that can be easily detected.It's important to remember that the S1 stream poses no credible threat to the Earth and humanity. There is no need for an action hero to save us. However, the synergy of science is staggering. A careful catalog of nearby stars has opened the prospect of a better possibility of finding and identifying dark matter, which is one of the great unanswered mysteries of modern physics. It's an amazing time we live in, in which we can study such things.\ 5625

  郑州飞秒激光手术哪家好   

After a year of doubts, recriminations and special election misfires, Democrats finally got the big victories Tuesday they'd so desperately craved in the year since Donald Trump won the presidency.Ralph Northam won the Virginia governor's race and Phil Murphy took a New Jersey governor's office that had been in Republican Chris Christie's hands for eight years. Across the map, in mayoral contests, state legislative races and ballot measures, everything broke Democrats' way.Republicans will wake up Wednesday in a nightmare: All of a sudden, full control of Congress might be in serious jeopardy. Trump's low approval ratings look toxic. And it could be much harder to convince incumbents to run -- and to recruit candidates into open-seat races -- in such a difficult environment. 793

  

A woman who was shopping at Heinen's grocery store in Bay Village, Ohio on Friday walked out of the store to find that her car was missing.As it turns out, another woman accidentally took the car home, thinking it belonged to her.According to Bay Village police, the two white Lexus cars were parked next to each other in the parking lot. A 60-year-old woman walked out and took one of the cars, thinking it was hers. When the other woman came out to get in her car, she realized it was gone. Police said the woman had left the keys in her car when she parked.The 60-year-old woman realized she was in the wrong car when she got home and was unable to open her garage. The car was returned to its rightful owner. 745

  

A woman led Sheboygan County Sheriff's deputies through three counties at speeds of more than a 100 mph after she stole candy and lighters. According to the criminal complaint, Nicole Rupert, 34, was pulled over in Sheboygan after being spotted in a Walmart taking some items. She pulled over on the highway at first, but when deputies asked her to move the car farther away from traffic, she took off.Deputies chased her, at one point reaching speeds of 115 mph. She maneuvered around cars on the highway even hit stop spikes near Oostburg. Deputies said her tires blew but she just kept driving.The chase was eventually called off but deputies were told to continue to follow her as she slowed down. Rupert eventually made it to downtown Milwaukee where her car came to a stop.Rupert has been charged with retail theft, fleeing and drug charges. Deputies also found an illegal prescription, pot and mushrooms in her car. She is due in court April 4 at 1:30 p.m.  992

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