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    • Mars might have an asteroid problem

      Mars might have an asteroid problem

      Popular Science via Yahoo News· 7 days ago

      According to their simulations, there are almost 17,000 PHAs that could skim past Mars, but only about 4,700 such asteroids around Earth. [ Related: What...

    • Finding the age of a contact binary 'moon'

      Phys.org· 7 hours ago

      It found that Dinkinesh had a "moon"—and that moon was a "contact binary." Now known as Selam, it is made up of two objects that physically touch one another through gravity but aren't fully ...