The Leonid meteor shower arrives this weekend. It will peak on Saturday, Nov. 18 in the eastern sky beginning at around 11 p.m. Fog permitting, we may see about 15 per hour, radiating from the constellation Leo, the lion. The full moon rises Monday, Nov. 27. In Celtic tradition, it is called the mourning moon, a time to cleanse the spirit and prepare for the yule season. It will rise over a weeklong period of…