as·tron·o·my
astronomy
- pronunciation:
stra
n
mi
- features:
- Word History, Word Explorer
| 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. |
The word
astronomy comes from
astronomos, an ancient Greek word that means "one who arranges the stars."