An anonymous reader writes "The annual Perseid meteor shower, which is caused by debris from Comet Swift-Tuttle and has been observed for about 2000 years, will be hampered this year by the full moon. The full moon falls on August 13, and is also called 'Grain Moon' or 'Green Corn Moon.' During this time, the moon rises about the same time the sun sets, and sets at about the same time the sun rises. This will create difficulty in viewing the Perseid meteor shower, which peaks on the night of Friday and into the early morning of Aug. 13."