Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to astronomy.
  • adj. Of enormous magnitude; immense: an astronomical increase in the deficit.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or relating to astronomy.
  • adj. Very large; of vast measure.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to astronomy; in accordance with the methods or principles of astronomy.
  • n. geography treats of the earth as a planet, of its shape, its size, its lines of latitude and longitude, its zones, and the phenomena due to to the earth's diurnal and annual motions.

from The Century Dictionary and Cyclopedia

  • Pertaining or related to astronomy; connected with or relating to astronomic observation or research.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relating or belonging to the science of astronomy
  • adj. inconceivably large

Etymologies

Attested since at least 1550, from Middle French astronomique or directly from Latin astronomicus, from Ancient Greek ἀστρονομικός. (Wiktionary)

Examples

  • In addition, it took 11 years of observing to tease out the presence of the habitable zone planet, a short time in astronomical terms.

    First 'habitable zone' planet found outside solar system

  • "One hundred million years to a human seems an awful long time, but in astronomical time periods, that's nothing compared to the life of the stars."

    Oldest Galaxy Discovered From 13.1 Billion Years Ago, Astronomers Say (PHOTO)

  • WASHINGTON & mdash; The cost of NASA's replacement for the Hubble Space Telescope is giving new meaning to the word astronomical, growing another $1.5 billion, according to a new internal NASA study released Wednesday.

    NASA: James Webb Space Telescope Costs Becoming Astronomical

  • Like whirling tornados coming in astronomical sequence of order and in numbers, Barack Obama is definitely twisting across the nation pounding CHANGE without boundaries with a fury!

    Obama campaign e-mail cites GOP anxiety

  • (The apparent motion against the stars is due to the fact that Comet SW3 has been fairly close to the Earth, about 25 times the distance between the Earth and Moon; that's close in astronomical terms.)

    Comet Schwassmann-Wachmann 3 Passing by the Earth

  • If you did well on it, you're pretty well versed in astronomical knowledge.

    April 2005

  • The 20th century warming counters a millennial-scale cooling trend which is consistent with long-term astronomical forcing.

    Nature on NAS « Climate Audit

  • This is the work of Texas State University professor Donald W Olson and his team, who specialise in 'astronomical sleuthing'.

    Archive 2003-12-01

  • In the second century B.C. a little circle appeared in Greek astronomical texts as a place holder, most probably an abbreviation of the Greek word oudén (“not one,” “nothing”).

    NUMBER

  • Thus we have two great and infinitely valuable attributes of the photographic plate in astronomical investigations, fidelity or accuracy, and seeing the unseeable.

    Photographing the Sky

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