It seems a little early but Christmas school visits start again tomorrow. So tonight we’re getting ready for a whole load of Y5 & Y6 children exploring the Christmas narrative. 
Apparently, 
There are an estimated 200,000,000,000,000,000,000,000 stars in the universe (200 sextillion)
There are an estimated 100,000,000,000 stars in the Milky Way (100 billion)
An estimated 6000 stars are visible to the human eye.
The Magi studied these stars and followed one unusual star, or comet, which ushers in the Christmas narrative. 
Phew!