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As colleges across the country have canceled classes for the remainder of the year in the hopes of limiting the spread of COVID-19, Liberty University in Virginia is welcoming students back to campus.An order by Virginia Gov. Ralph Northam that bans gatherings of more than 10 people means that Liberty won't be able to hold-in person classes. But the school will still hold online classes and plans to allow students to live on-campus for the remainder of the school year.A page on 495

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

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As millions of dollars roll in to help rebuild the historic Notre Dame Cathedral, people have been inspired to donate to rebuild three churches in Louisiana that were intentionally burned down.The intentionally set fires burned three historically black churches in rural St. Landry Parish -- about 30 miles north of Lafayette -- St. Mary Baptist Church on March 26, Greater Union Baptist Church on April 2 and Mount Pleasant Baptist Church on April 4.Fundraising efforts for the churches that started last week had reached more than 0,000 of the .8 million needed when on Tuesday the 601

Boeing said Tuesday that it found debris contaminating the fuel tanks of some 737 Max jets that it built in the past year but was unable to deliver to airline customers.A Boeing official said the debris was discovered in “several” planes but did not give a precise number. Boeing built about 400 undelivered Max jets before it temporarily halted production last month.The fuel tank debris was discovered during maintenance on parked planes, and Boeing said it immediately made corrections in its production system to prevent a recurrence. Those steps include more inspections before fuel tanks are sealed.A Boeing spokesman said that the issue would not change the company’s belief that the Federal Aviation Administration will certify the plane to fly again this summer.An FAA spokesman said the agency knows that Boeing is conducting a voluntary inspection of undelivered Max planes.The FAA “increased its surveillance based on initial inspection reports and will take further action based on the findings,” said spokesman Lynn Lunsford.Metal shavings, tools and other objects left in planes during assembly can raise the risk of electrical short-circuiting and fires.Mark Jenks, Boeing’s general manager of the 737 program, said in a memo to employees who work on the 737, “During these challenging times, our customers and the flying public are counting on us to do our best work each and every day.” Jenks called the debris “absolutely unacceptable. One escape is one too many.”The debris issue was first reported by aviation news site Leehamnews.com.Max jets were grounded around the world last March after two crashes killed 346 people. Boeing is conducting test flights to assess updates to a flight-control system that activated before the crashes on faulty signals from sensors outside the plane, pushing the noses of the aircraft down and triggering spirals that pilots were unable to stop.While investigators examining the Max accidents have not pointed to production problems at the assembly plant near Seattle, Boeing has faced concerns about debris left in other finished planes including the 787 Dreamliner, which is built in South Carolina. 2169