On July 31, 2021, I had the rare opportunity to see an optical halo feature known as a Lower Tangent Arc. I was able to take two snapshots. What makes this lower arc special is that it only appears when the bottom of the halo is both visible and positioned below the celestial horizon. This…

Earlier this month, I observed a sunset that I couldn’t quite explain. While an occasional solar halo or a pair of sun dogs are known to entertain us pilots at higher altitudes, this wasn’t one of those. This sunset was accompanied by two perfectly vertical rainbow-colored columns of light. The best photo I took was…