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(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) — Country music artists banded together Wednesday to celebrate and recognize the best in the industry and provide some needed relief to a reeling music community.Nearly a week after the deadly shooting at a Thousand Oaks bar known for its affinity for country music, musicians focused on healing and laughing at the 52nd annual Country Music Association Awards. Garth Brooks led a solemn tribute to the 12 people killed during a shooting at a Southern California country music bar last week.RELATED: There's A Gender Gap In Country Music Radio - But Not In Its FansBrooks said the victims were "lost too soon" and urged viewers and the audience to "celebrate their lives." He then took off his hat and asked everyone to join him in a moment of silence. The names of those killed were shown on a black screen for television audiences.Authorities are still trying to determine what led a former Marine to attack the Borderline Bar & Grill in Thousand Oaks on Nov. 7 during a country music dance night that drew area college students and other young people.After the moment of silence, the show began with a rousing performance of Luke Bryan's song "What Makes You Country."Hosts Carrie Underwood and Brad Paisley will help move the community through their healing process Wednesday, known for their lighthearted jokes poking at one another, their fellow singers, and — a week after midterms — politics.Also, a special appearance by Paisley's "older brother," Gary."His other name is Will Ferrell," Paisley said on Good Morning America. Ferrell recently crashed Paisley's benefit show as well. "We're trying to keep him out, but we'll see."You turn on the news this morning and there's these fires and shootings and we're hoping especially next week at the CMAs to give everybody a bunch of laughs. It's just going to be fun and [we'll] try our best," Paisley told GMA.The awards show will air at 8 p.m. on ABC10. 1974

(KGTV) - Award-winning journalist Tamron Hall is coming to ABC 10News in September with a new talk show. The mom, newlywed, and survivor will cover stories from the deeply moving - to purely fun. “It’s been my dream to lead a show that brings people together and lets everyone’s voice be heard. This isn’t my show, it’s our show. See you in September,” Hall posted on the show’s website. Hall has decades of experience as a journalist, covering breaking news stories and consumer issues. She is also a former host co-host of Today and host of MSNBC Live with Tamron Hall. In 2016, Safe Horizon, which provides assistance to those coping with domestic abuse, teamed up with Hall to launch the Tamron Renate Fund in honor of her sister, a victim of domestic violence. San Diegans can watch Tamron Hall on ABC 10News starting Monday, September 9. More information is available here. 887

(KGTV) — California Highway Patrol is advising motorists to be prepared for a possible shut down of the Grapevine stretch of Interstate 5 this week.With a major winter storm expected to sweep through Southern California over the Thanksgiving holiday, CHP sent out a warning Tuesday for motorists to stay alert if using I-5 between Santa Clarita and Mettler, Calif."We are expecting snow on the Grapevine starting this Wednesday," CHP wrote. "We always hope to keep it open, however safety is our top priority. If the conditions become unsafe, we will hold traffic until Caltrans HQ makes the roadway safe. Expect a high volume of traffic this holiday week. Expect some delay and give yourself plenty of time to arrive at your destination safely."As an backup, CHP provided a map of alternate routes around the Grapevine through Highway 14 or Highway 101:Rain may hit Santa Clarita as early as Tuesday, with freezing conditions possible Thursday night. Holiday travel this week is expected to reach the second-highest volume nationally since 2002, and the highest volume on record for California. AAA says more than 7 million Americans plan to travel 50 miles or more this Thanksgiving, with about 4.3 million of those travelers in Southern California alone.Of those Southern Californians, about 3.7 million will be hitting the roads.RELATED:AAA provides tips on preparing vehicles for holiday travelTSA offers advice to travelers for Thanksgiving holiday weekendCheck 10News Traffic conditions 1501

(KGTV) - Did NASA really say that February 10th was the only day you can make a broom stand on its own?No.Many people posted videos of themselves balancing a broom on its end.But you can do that any day. There was no special gravitational pull on that date and NASA never claimed there was.A broom typically has a low center of gravity. So if you stand it on end and spread the bristles just right, you can form a tripod-like structure which will hold up the broom. 473

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