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Astronomers have detected the most massive neutron star ever, and it almost shouldn't even exist.Neutron stars are the smallest in the universe, with a diameter comparable to the size of a city like Chicago or Atlanta. They are the leftover remnants of supernovae. But they are incredibly dense, with masses bigger than that of our sun. So think of the sun, compressed into a major city.In the case of the newly detected neutron star, dubbed J0740+6620, it's 333,000 times the mass of the Earth and 2.17 times the mass of the sun. But the star is only about 15 miles across. It's 4,600 light-years from Earth.This is close to the limit of how much mass a compact object can contain before it crushes itself into a black hole.The neutron star itself is rapidly spinning, which is called a pulsar because they send out beams of radio waves from each magnetic pole. The beams mimic the sweeping motion of a lighthouse beam, hence the name "pulsar."Pulsars act like atomic clocks because they regularly pulse, so astronomers can use them to study space and time.The star was detected by the 1098

As @GretaThunberg said, “We have to act like our house is on fire, because it is.” @JaneFonda, activists, Indigenous leaders, experts, & community members are answering the alarm sounded by youth to demand action on the climate emergency.Join us for #FireDrillFriday ?? pic.twitter.com/XXanwTQs2w— Fire Drill Fridays (@FireDrillFriday) October 11, 2019 368

Authorities in Tennessee are reviewing all pending cases involving a Knox County Sheriff's Office detective after he gave a sermon at his church that called for the government to execute members of the LGBTQ community."They are worthy of death," Grayson Fritts said in a June 2 sermon at All Scripture Baptist Church, a small church in Knoxville that he leads.The church posted the sermon online and then removed it, according to 442

Both the US Army and the Los Angeles Police Department will be on alert -- and one theater chain has banned all costumes -- during the screening of "Joker."The Los Angeles Police Department has announced that officers will have "high visibility" at theaters during premiere screenings of "Joker."The US Army, meanwhile, confirmed it had sent out a memo obtained by CNN to commanders in Fort Sill, Oklahoma, about a potential violent threat discovered in discussion on the dark web about the possible targeting of a theater during the movie's release.The Fort Sill Criminal Investigation Command office "did so out of an abundance of caution to help keep our soldiers and their families safe," said Chris Grey, a spokesperson for USA CID."At this point, we are not aware of any information indicating a specific, credible threat to a particular location or venue," he said.LAPD asks residents to stay vigilantThe dark theme of the million film, about the rise of Batman's bad clown nemesis, 1006

An elderly dog found discarded in a trash can in north Philadelphia has died from her injuries, leaving fans of "Pringles" devastated.Pringles was found with a traumatic head injury at the bottom of a trash can October 3 when she was rescued by the 261