astronomy

[ uh-stron-uh-mee ]

noun

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

astronomy

/ əˈstrɒnəmɪ /

noun

1. 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

astronomy

/ ə-strŏn′ə-mē /

1. 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.

astronomy

1. 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.

Word History and Origins

Origin of astronomy¹

First recorded in 1175–1225; Middle English astronomie, from Anglo-French, from Latin astronomia, from Greek; equivalent to astro- + -nomy

Word History and Origins

Origin of astronomy¹

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

Example Sentences

The authors took care to eliminate the possibility of other sources of polarization, which is always a concern in astronomy.

From The Daily Beast

Muslims made many discoveries in mathematics, chemistry, physics, medicine, astronomy and psychology.

From The Daily Beast

Nearly everything we know about dark matter so far comes from astronomy.

From The Daily Beast

One of the big challenges in astronomy involves determining when the first galaxies formed, and what they looked like.

From The Daily Beast

Cosmic ray observations are more challenging than many other forms of astronomy.

From The Daily Beast

A learned Professor declared that no person unacquainted with astronomy could correlate “Moon” to “Omnibus.”

From Project Gutenberg

First of all comes astronomy, including the phenomena exhibited in the heavens, beyond the limits of the earth's atmosphere.

From Project Gutenberg

Science began with astronomy, and the first instruments which men contrived for the purpose of investigation were astronomical.

From Project Gutenberg

As stated in the chapter on astronomy, some trace of the triangular form appears in the land masses of the planet Mars.

From Project Gutenberg

He talked until late into the night about astronomy and its latest discoveries.

From Project Gutenberg

Related Words

• astrophysics