What’s Up in the Night Sky? December 2015

Written by  Wednesday, 16 December 2015 17:27
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To try and figure out what celestial event might have been the Star of Bethlehem 2000 years ago, we must have a reasonably accurate idea of when Jesus Christ was born. Theological historians place the birth of Jesus in September or October in 3 or 2 BC. They researched several historical facts derived from biblical accounts in Matthew and Luke to arrive at that date. These facts included the date of the census taken at that time; who was ruling Judea and Syria; and the death of Herod in 1 BC.

First, it must be noted that in ancient times the word ‘star’ could be interpreted several ways. It could be any bright object that traveled across the sky. We can discount a meteor shower or Supernova as the Star of Bethlehem. Accounts require that the bright object appear in the eastern sky, cross the starry background and move before the Magi to Judea. Meteors travel quickly across the sky and a shower lasts only a short time. No Supernova was reported during the period we are investigating. We can also discount comets, because they were considered to be signs of evil and bad omens.

That leaves us with planets or groupings of planets to match the biblical description and there are a series of conjunctions that roughly fit our time period. A conjunction is when two or more planets and, or stars come close to each other.

Matthew relates that the star appeared in the rays of the rising Sun. On August 1st , 3 BC, Jupiter rose up in the light of dawn. At 5 AM on August 13th, Jupiter and Venus were very close together. A few days later on the 18th, Venus and Mercury appeared at dawn in a conjunction. On September 14th Jupiter was in conjunction with the very bright star Regulus. Jupiter and Venus, the two brightest planets in the sky, were so close, they appeared to fuse together. A grand conjunction of planets occurred on August 27th when Jupiter, Mars, Mercury and Venus were a tight bundle at sunrise. By mid-October the Magi saw Jupiter above Bethlehem. Jupiter had reached its farthest point west and stood still against the stars high in the sky above Bethlehem.

I have given you an astronomer’s explanation of the symbol of the Star of Bethlehem shining with all the stars in the heavens above. I leave it to you to mix your faith with the wonderful miracles of the universe. To me this star symbolizes all the wishes for hope and joy and friendship during this holiday season.

Merry Christmas to all and to all a good night – astronomy wise that is!


You may contact Fred Garrett through this paper or email to This email address is being protected from spambots. You need JavaScript enabled to view it.

The Beginner’s Observer’s Guide by Leo Enright is available at the Sharbot Lake Pharmacy or by contacting the Royal Astronomical Society of Canada www.rasc.ca/publications, subscriptions for our very own excellent Canadian astronomy magazine, Sky News, are also available from RASC..

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