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2025-05-31 04:32:15
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Although NASA's Kepler space telescope ran out of fuel and ended its mission in 2018, citizen scientists have used its data to discover an exoplanet 226 light-years away in the Taurus constellation.The exoplanet, known as K2-288Bb, is about twice the size of Earth and orbits within the habitable zone of its star, meaning liquid water may exist on its surface. It's difficult to tell whether the planet is rocky like Earth or a gas giant like Neptune.The planet is in the K2-288 system, which contains a pair of dim, cool M-type stars that are 5.1 billion miles apart, about six times the distance between Saturn and the sun. The brightest of the two stars is half as massive as our sun, and the other star is one-third of the sun's mass. K2-288Bb orbits the smaller, dimmer star, completing a full orbit every 31.3 days.K2-288Bb is half the size of Neptune or 1.9 times the size of Earth, placing it in the "Fulton gap" between 1.5 and two times the size of Earth. This is a rare size of exoplanet that makes it perfect for studying planetary evolution because so few have been found.The discovery was announced Monday at the 233rd meeting of the American Astronomical Society in Seattle."It's a very exciting discovery due to how it was found, its temperate orbit and because planets of this size seem to be relatively uncommon," said Adina Feinstein, a University of Chicago graduate student in astrophysics and lead author of a paper describing the new planet that was accepted for publication by The Astronomical Journal.Although all of the data from the Kepler mission was run through an algorithm to determine potential planet candidates, visual manpower was needed to actually look at the possible planet transits -- or dip in light when a planet passes in front of its star -- in the light curve data. Kepler observed other events that could be mistaken for planet transits by a computer.But the "reboot" of the Kepler mission in 2014 that led to the K2 mission allowed for multiple observation campaigns that brought in even more data. Every three months, Kepler would stare at a different patch of sky."Reorienting Kepler relative to the Sun caused miniscule changes in the shape of the telescope and the temperature of the electronics, which inevitably affected Kepler's sensitive measurements in the first days of each campaign," said study co-author Geert Barentsen, an astrophysicist at NASA's Ames Research Center, in a statement.Those first three days of data were ignored, and errors were corrected in the rest of the data gathered.But the scientists couldn't do it alone. There were too many light curves to study on their own.So the reprocessed, "cleaned-up" light curves were uploaded through the 2731

  濮阳东方医院妇科咨询大夫   

A person who dropped a backpack and tried to jump a bike rack near the White House has been taken into custody by the Secret Service, the agency tweeted Wednesday."At approximately 2:45 pm an individual dropped a backpack and attempted to jump a bike rack along the sidewalk on Pennsylvania Ave. The individual was immediately taken into custody by Secret Service Uniformed Division Officers," the agency tweeted around 3 p.m. ET.Secret Service responded with an update about a half hour later that the backpack had been cleared, and that pedestrian traffic would soon reopen.It's unclear if the person detained was arrested or will face charges. 658

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Amid rescues in devastated areas, officials in the Bahamas raised the death toll from Hurricane Dorian, brought in body bags and coolers and said hundreds of residents remain missing.Officials gave the sobering outlook Thursday as the official toll climbed to 23. But they are expecting many more than that as the extent of the damage becomes clear."Literally hundreds, up to thousands, of people are still missing," Joy Jibrilu, director general of the country's tourism and aviation ministry, told CNN's Michael Holmes.Body bags, additional morticians and refrigerated coolers to properly store bodies are being transported to Abaco and other affected areas, Health Minister Dr. Duane Sands said during a radio interview on Guardian Radio 96.9 FM. Four morticians in Abaco are embalming remains because officials have run out of coolers, he said."The public needs to prepare for unimaginable information about the death toll and the human suffering," Sands said."Make no bones about it, the numbers will be far higher than 23," he said. "It is going to be significantly higher than that. And it's just a matter of retrieving those bodies, making sure we understand how they died. It seems like we are splitting hairs, but not everyone who died, died in the storm.""It's going to be huge," he said.There was some good news amid the desperate search for survivors.The US Coast Guard said it had rescued 201 residents as of Thursday. Rescues have concentrated on Bahamas' northern islands, as international teams sent small planes and helicopters to reach those stranded and feed the displaced."Our emergent priority is to get the critically wounded out and help the government of the Bahamas get the infrastructure back up so it's safe, sanitary and livable -- at least on a temporary basis -- for those folks," Capt. James Passarelli, chief of staff of the Coast Guard's 7th District, told CNN.Teams from Los Angeles and Fairfax, Virginia, are also helping survivors on the hard-hit Abaco Islands and Grand Bahama, the US Agency for International Development said.A British naval vessel has joined the effort, distributing food and water, and clearing streets of debris, Bahamian Minister of National Security Marvin Dames said Wednesday. About 60,000 people may be in dire need of food relief, the World Food Programme has said.Dorian, the strongest hurricane ever to hit the Bahamas, wiped out whole neighborhoods, then lingered for days, pounding the same battered places again and again.Though the storm targeted only a small section the Bahamas -- a nation of more than 700 islands -- it still inflicted "generational devastation," Prime Minister Hubert Minnis said.Service members rush to helpAt least 80 people had been rescued and evacuated Thursday morning from the Abacos, a government official told CNN. Many were flown to the Odyssey Aviation center outside Nassau Airport, where a CNN team saw rescue and relief aid helicopters and small planes landing and taking off."Most of the operations to date have been relocating and transporting the critically injured to a higher level of medical care," Passarelli, the Coast Guard official, said.Many of those rescued were taken to Nassau, he said.The Coast Guard now has 10 fixed-wing aircraft, 14 rescue helicopters and at least three different cutters -- a term used to identify vessels -- in the Bahamas to assist, spokesman Chief Warrant Officer Barry Lane said.More help is on the way.At least 8 metric tons of food were on their way from Miami to the Bahamas, Herve Verhoosel, a spokesman for the United Nations' World Food Programme (WFP) said in a statement.Another 85 metric tons of "ready to eat" meals would be brought in the next three months, and the WFP was organizing an airlift of storage units and generators that will be brought to the Bahamas from Panama, the spokesman said.The International Federation of Red Cross and Red Crescent Societies planned to receive relief supplies in Nassau on Thursday afternoon, the organization said in a statement."Getting relief to people in need is our number one priority," it said. "We are doing everything we can to get aid to hard-to-reach places in the wake of Hurricane Dorian."The Red Cross efforts were hampered by damaged roads and telecommunications infrastructure, the statement added.Resources have been cut offAs authorities rushed to respond to the damage, they have come up against limited access to important resources.The 4466

  

Actor Rip Torn, who played Artie the producer in the hit TV show "The Larry Sanders Show" has died at the age of 88, Hollywood Reporter said. Torn’s wife Amy and his daughters Katie and Angelica were by his side at the time of his death, the Hollywood Reporter reported. Torn’s six-decade career included dozens of appearances on both the big screen and on television. Torn’s career reached a crescendo in the 1980s and 90s, earning an Academy Award nomination for his portrayal of Marsh Turner in the film “Cross Creek.”In 1992, he landed the role of Artie in the “The Larry Sanders Show.” In 1996, Torn won an Emmy for Best Supporting Actor in a Comedy Series. 675

  

Actor Jussie Smollett will appear in court Thursday for a second time this week after he was indicted on 16 felony counts for allegedly staging a hate crime and filing a false police report.The "Empire" actor, 36, will be arraigned before a judge and enter a formal plea. He was in court Tuesday for a hearing to determine whether a judge should allow cameras in court.His legal team said it welcomes cameras in court due to what it described as "misinformation" leaked to the media since he 504

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