A rare event in the heavens just ahead of Christmas will feature an alignment of planets that a famous astronomer believed was the phenomenon that is mentioned in the Bible when Jesus Christ was born. The alignment of Jupiter and Saturn will appear in the skies on December 21, the winter solstice. The last time the rare alignment of the planets was this close was in 1623, nearly 400 years ago. That was only 14 years after Galileo discovered the moons of Jupiter with the invention of the telescope. Another famous astronomer, Johannes Kepler, posited in 1614 that the alignment...