Green 'Christmas Comet' <br />Is Visible This Month 46P/Wirtanen got the<br />nickname because of <br />its greenish glow. It will be close <br />enough to view with <br />the naked eye <br />for several days. Paul Chodas, NASA's JPL, via NPR Wirtanen placed in the top ten <br />of Earth's modern "comet <br />close encounters." The small comet <br />doesn't have <br />much of a tail, Wirtanen is <br />currently close to <br />the constellation Orion. The University of Maryland <br />has set up a website for amateur <br />astronomers tracking the comet.
