Mindboggling?
They are "Laws of Planetary Motion". So I guess the answer is "motion".
Three letter animals that start with the letter c:catcodcow
xis
Now
Emu
any
You is not a letter it is three letters in a word.
hadhaghamhashathayhemhenherheyhidhimhiphishithoghoehothowhuehubhumhut
nun
Guy
xed
use
-its -ima -imt