Published: 2008-01-22 11:57:13
Updated: 2008-01-22 11:57:13
Posted January 22, 2008 11:57 a.m. EST
By Carol Williamson
MIKE MOSS SAYS: Carol, it seems likely that you saw a typical jet aircraft contrail, but happened to look up on a night when bright moolight made it plainly visible. We probably tend to notice fewer contrails at night because of a variety of factors - on many nights there are either obscuring clouds, or a lack of moonlight when clouds are absent, or we simply spend most of our time under a roof, and finally that later at night there are fewer aircraft aloft.