As we rang in the new year, we were treated to a special astronomical appearance of Comet C/2013 US10 Catalina, close to the bright star Arcturus in the image below.  Also visible near the top is the faint Comet P/19 Borrelly, and between the two comets is a bright meteor that swept through the scene. It’s remarkable to notice the clearly visible tales of Catalina, the blue ion tail sweeping directly away from the Sun due to solar wind pressure, and the dusty white tail marking the path of the comet.  The dust is too heavy to be swept away...