宜宾割双眼皮有没有副作用(宜宾开双眼皮费用计算) (今日更新中)

(CNN) -- Scientists have discovered a "monster black hole" so massive that, in theory, it shouldn't exist.It's a stellar black hole — the type that forms after stars die, collapse, and explode. Researchers had previously believed that the size limit was no more than 20 times the mass of our sun because as these stars die, they lose most of their mass through explosions that expel matter and gas swept away by stellar winds.This theory has now been toppled by LB-1, the newly-discovered black hole. Located about 15,000 light years away, it has a mass 70 times greater than our sun, according to a press release from the Chinese Academy of Sciences.The findings were published by Chinese researchers in the journal Nature on Wednesday."Black holes of such mass should not even exist in our galaxy, according to most of the current models of stellar evolution," said Liu Jifeng, head of the team that made the discovery. "LB-1 is twice as massive as what we thought possible. Now theorists will have to take up the challenge of explaining its formation."Scientists are now scratching their heads at how LB-1 got so huge.The Chinese team has proposed a number of theories. LB-1's sheer size suggests that it "was not formed from the collapse of only one star," the study said -- instead, it could potentially be two smaller black holes orbiting each other.Another possibility is that it formed from a "fallback supernova." This is when a supernova -- the last stage of an exploding star -- ejects material during the explosion, which then falls back into the supernova, creating a black hole.This fallback formation is theoretically possible, but scientists have never been able to prove or observe it. If this is how LB-1 formed, then we may have "direct evidence for this process" for the first time, the study said.LB-1 is not the biggest black hole ever discovered -- but it may be the largest of its kind. There are several types of black holes, and stellar black holes like LB-1 are on the smaller side, according to NASA. Supermassive black holes are much bigger -- they can be billions of times the mass of our sun.Scientists believe supermassive black holes may be connected to the formation of galaxies, as they often exist at the center of the massive star systems -- but it is still not clear exactly how, or which form first.Stellar renaissanceStellar black holes are believed to be commonly scattered across the universe, but they are difficult to detect because they do not normally emit X-rays -- only doing so when they gobble up gas from a star that has ventured close enough. They are so elusive that scientists have only found, identified, and measured about two dozen stellar black holes, the press release said.The researchers at the Chinese Academy of Sciences tried a different approach. Instead of looking for X-rays emitted by black holes, the team looked for stars that were orbiting some invisible object, being pulled in by its gravity.Their efforts paid off -- they soon spotted a giant star eight times heavier than the sun, orbiting around what turned out to be LB-1."This discovery forces us to re-examine our models of how stellar-mass black holes form," said David Reitze, a physicist at the University of Florida. In May, Reitze's team made its own breakthrough discovery -- observing the never-before-seen collision of a neutron star and a black hole, which sent out ripples in space and time.These twin discoveries -- the collision, and now LB-1 -- indicate that scientists are reaching "a renaissance in our understanding of black hole astrophysics," said Reitze in the press release.There have been several other discoveries over the past year that have added to this renaissance. In October, researchers discovered what they believe to be a new type of black hole, smaller than the other kinds. And earlier this week, astronomers discovered a black hole that is actually helping baby stars grow instead of destroying them. 3971

(KGTV) -- A skydiver has died following an accident near Skydive San Diego Sunday morning. The agency tweeted around 11 a.m. that a skydiver was injured near Otay Lakes Road northwest of the glider port. Cal Fire later confirmed that the skydiver died while crews performed CPR. The agency worked with with the San Diego County Sheriff’s Department and the Chula Vista Fire Department. 10News will continue to keep you updated as soon as we receive more information. 474

(KGTV) -- A fire that tore through a Chula Vista playground overnight is being investigated as suspicious, the Chula Vista Fire Department says.The fire was reported just after 4:50 a.m. at the Veterans Park Community Center. Video of the scene shows roaring flames erupting from the playground before a loud explosion is audible. At this time, the department says the fire is under investigation as suspicious. Several other residential and business fires also took place overnight Saturday and into the early morning. The first fire damaged an El Cajon home on the 1700 block of Hacienda Place just before 3:30 a.m. One person was injured due to smoke inhalation. Heartland Fire and Rescue says one man was found in the backyard of the home with minor injuries. Another person suffered smoke inhalation.The blaze is under investigation by the El Cajon Police Department and the Sheriff Department’s Bomb and Arson unit.The second fire burned through the La Tiendita Mexican Market on the 3800 block of Clairemont Mesa Boulevard around 9 a.m. Saturday. The cause is unknown. There is no indication of any link between the three fires at this time. See the map below for all the locations: 1197

(KGTV) - Disneyland isn’t just any theme park; its charm comes from the unique touches and hidden features that engage visitors. Star Wars: Galaxy’s Edge is sure to delight fans with its ability to transport them out of this world. 10News explored the planet of Batuu and found features guests will want to experience on their first visit. Walt DIsney Imagineers who created the new land traveled to Morocco and Turkey to experience open-air markets to create the Marketplace section of Galaxy’s Edge. They also examined George Lucas’ private archives to study artwork by Ralph McQuarrie, who helped create the look of Star Wars. PHOTOS: Check out cool features at Disneyland's Star Wars: Galaxy's EdgePrincess Leia freshened up after her near-fatal experience in a Death Star trash compactor. Fans of her final scene look from "A New Hope" can purchase her massive silver necklace in the Den of Antiquities, one of Batuu's stores.The devotion to authenticity is reflected in the rusty, industrial, and lived-in look of Batuu.... even down to the bathrooms.MORE 'GALAXY'S EDGE': 1086

(KGTV) - A group of Massachusetts police officers and firefighters are being hailed as heroes after coming to the aid of a choking puppy this week.North Reading resident Megan Vitale stormed into a police station Sunday telling officers her 9-week-old Saint Bernard puppy, Bodhi, was choking on food. An acquaintance came running in with Bodhi shortly after, the puppy limp and unresponsive in his arms, surveillance footage from the station showed.A group of officers came running out to begin administering first aid to the puppy. A group of North Reading firefighters also arrived at the station to help with back blows and chest compressions. RELATED: Beloved lizard missing from Spring Valley pet storeAfter 10 minutes, the food blockage was finally dislodged and Bodhi was revived."Ultimately, a life was saved thanks to rescuers falling back on their training and remaining calm. Even though we are not faced with this kind of incident every day, the officers reacted just as they would in any emergency situation," North Reading Police Chief Murphy said. “We are hopeful that the puppy will make a full recovery."Firefighters used a special oxygen tank designed for pets to help Bodhi get breathing again."Many of our firefighters have pets at home in their own families. We do not get to choose the emergency situation that comes our way, so it is important that first responders be prepared for anything," Fire Chief Stats said.Bodhi was able to leave with Vitale to receive follow-up care from a veterinarian, according to the police department. 1599

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