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In reality, of course, they won’t be close at all. Think about the distance from the Earth to the Sun. That’s what astronomers call an astronomical unit (au), and it’s how they measure distances in the vastness of the Solar System. Jupiter is 5 au from us. Saturn is 10 au. These two planets aligned in the Solar System a few weeks ago, but on December 21 they’ll appear aligned to us on Earth. Our line of sight is different because we’re orbiting quickly around the Sun. “Alignments between these two planets are rather rare, occurring once every 20 years or so, but this conjunction is exceptionally rare because of how close the planets will appear to be to one another,†said Patrick Hartigan, astronomer at Rice University. “You’d have to go all the way back to just before dawn on March 4, 1226, to see a closer alignment between these objects visible in the night sky.â€
Well... Except the divine birth, and the shepherds and all happened in September, and not December... so..
picky, picky, picky....
