astronomy

[ uh-stron-uh-mee ]
/ əˈstrɒn ə mi /
SEE SYNONYMS FOR astronomy ON THESAURUS.COM

noun

the science that deals with the material universe beyond the earth's atmosphere.

Origin of astronomy

1175–1225; Middle English astronomie (< Anglo-French) < Latin astronomia < Greek. See astro-, -nomy

Words nearby astronomy

astronomical telescope, astronomical triangle, astronomical twilight, astronomical unit, astronomical year, astronomy, astrophotography, astrophotometry, astrophysics, astrosphere, astrotourist

Words related to astronomy

astrophysics, stargazing, astrometry, uranology, selenology, astrochemistry

Example sentences from the Web for astronomy

British Dictionary definitions for astronomy

astronomy
/ (əˈstrɒnəmɪ) /

noun

the scientific study of the individual celestial bodies (excluding the earth) and of the universe as a whole. Its various branches include astrometry, astrodynamics, cosmology, and astrophysics

Word Origin for astronomy

C13: from Old French astronomie, from Latin astronomia, from Greek; see astro-, -nomy

Scientific definitions for astronomy

astronomy
[ ə-strŏn′ə-mē ]

The scientific study of the universe and the objects in it, including stars, planets, nebulae, and galaxies. Astronomy deals with the position, size, motion, composition, energy, and evolution of celestial objects. Astronomers analyze not only visible light but also radio waves, x-rays, and other ranges of radiation that come from sources outside the Earth's atmosphere.

Cultural definitions for astronomy

astronomy

The science that deals with the universe beyond the Earth. It describes the nature, position, and motion of the stars, planets, and other objects in the skies, and their relation to the Earth.