A roughly mile-wide asteroid is about to give Earth a proverbial buzz-cut this weekend. The asteroid will come within .032 au of Earth. Zero-point-three-two! Holy moly! But don’t worry. An au, or Astronomical Unit, is a very large measurement. It is the distance from the Earth to the Sun. Or about 93 million miles. So 0.32 of 93 million is… Read more →