A beam of light intensifies before the sun rises: morning Zodiacal light. My favorite image from a series of photos I took Friday morning just before the end of astronomical darkness. A few clouds drifting over the area enhanced the color of the bright star Sirius (middle right) and added a bit more color on the horizon. Click picture for a larger version.
It wasn’t but 15 minutes earlier that the sky was completely clear as captured in the picture below, taken with a different angle that captured the Pleiades .
There were active imagers and observers scattered throughout the field. Click image for a larger version. Both of these photographs were 1 minute long exposures using a Skytracker to follow the stars.
The steady brightening of the Zodiacal light was a pleasure to experience this year. Starting about an hour before the end of astronomical darkness the cone of light slowly grows in intensity until a moment is reached where it is brightest and the sky is still dark. Then it fades, the sky begins to lighten as the sun creeps closer to the horizon and the Zodiacal light is washed out with the approaching dawn.