Quad Quads

Today's Astronomy Picture of the Day shows quads on the ground and quads in the sky in 2005. If you were up early enough, you saw one set of quads in the sky last week. This week, we still have three out of four of the participants: Mars, Venus and Jupiter. Over the past three or four weeks, if you had been paying attention, you would have been treated to a nice "dance of the planets" as planets moved "close" (apparently) to each other and then moved "rapidly" (apparently) apart.