The shot on the left is from Starry Night, an astronomy program. Venus is the bright "star" in the upper left. The star at the bottom is Nashira, in Capricorn. On the right is a shot I took on the evening of 28 December 2008. Same scene. Venus is there. So are Nashira and other stars. The one exception is the blue star near the middle. It's not in the star field on the left. The only stars in that spot are 11th-magnitude or dimmer. So: what is it? A nova? It's not an airplane, because it didn't move. It wasn't flying. I finally decided it's probably a lens flare from Venus. But I don't know.