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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

Can the flu shot cause a pregnant woman to miscarry?No, absolutely not. That's the verdict of a study presented Wednesday to the US Centers for Disease Control and Prevention's 189

An attorney says a Maryland man who was shot and killed by a police officer was asleep in his bedroom when police opened fire from outside his house. The 21-year-old man's girlfriend was also wounded. The Montgomery County Police Department said in a news release Friday that Duncan Socrates Lemp “confronted” police and was fatally shot by one of the officers early Thursday. An attorney for Lemp’s relatives said police couldn't have any justification for shooting Lemp based on what she has heard. Lemp's family says the warrant police obtained to search their Potomac home doesn’t mention any “imminent threat.” A police spokesman didn’t immediately respond to the family’s statement. 700

Beth Chapman, who is battling cancer, was hospitalized this weekend, according to a statement on her husband Duane "Dog" Chapman's official Facebook page."Beth was hospitalized Saturday due to an accumulation of fluid in her lungs," 245

Another group of high school students has been caught on video giving the Nazi salute.This time, the eight-second video appears to show students from Pacifica High School in Garden Grove, California, singing a Nazi marching song while raising their arms in a Nazi salute. The video was first obtained by 316