Strange words

The somewhat unusual word "ken" is best remembered by a variant of a famous English poem:
   
The Star or Twinkle, Twinkle, Little Star
by Jane Taylor, 1806
 
   
Original:   Physicists Version:
   
Twinkle, twinkle, little star,
How I wonder
what you are.
Up above the world so high,
Like a diamond in the sky.
Twinkle, twinkle little star.
I don't wonder
what you are,
´cause by spectroscopic ken
I know you are hydrogen.
     
Ken (Scottish) To know, to recognize (German "Kennen"); To have an understanding of something.
 

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© H. Föll (Electronic Materials - Script)