"John Donson" <harigejan@hotmail.com> wrote:

How about the star of Bethlehem? Flying saucer? Comet? Supernova? Spaceship?
Airplane? Hot air balloon? Bird set on fire by the romans?
Impossible to make certain now what it was.

Of course you left off the list "literary allusion or plot device".

D.
-- 
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