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astronomy

as·tron·o·my

astronomy

 
pronunciation:
stra n mi
features:
Word History, Word Explorer, Word Parts
part of speech: noun
definition: the branch of science concerned with the physical universe beyond the atmosphere of the earth.
The notion of black holes in space has fascinated people both inside and outside the field of astronomy.
Word History
The word astronomy comes from astronomos, an ancient Greek word that means "one who arranges the stars."
Word Explorer
See
  outer space, science, space
Word Parts
The word astronomy contains the following parts: