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astronomy+unit

См. также в других словарях:

  • astronomy unit — noun a linear unit used for astronomical distances • Hypernyms: ↑linear unit, ↑linear measure • Hyponyms: ↑light year, ↑light year, ↑light hour, ↑light minute, ↑light second, ↑ …   Useful english dictionary

  • Astronomy — • Divided into two main branches, astrometry and astrophysics; the former concerned with determining the places of the investigation of the heavenly bodies, the latter, with the investigation of their chemical and physical nature Catholic… …   Catholic encyclopedia

  • astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …   Universalium

  • astronomy — I (New American Roget s College Thesaurus) n. cosmology, cosmogony. See universe. II (Roget s IV) n. Syn. stargazing, astrochemistry, astrophysics, earth space science, selenology, astrophotography, astrophotometry, uranology, uranography,… …   English dictionary for students

  • Astronomical Unit — noun a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) (Freq. 1) • Syn: ↑AU • Hypernyms: ↑astronomy unit * * *… …   Useful english dictionary

  • linear unit — noun a unit of measurement of length • Syn: ↑linear measure • Hypernyms: ↑unit of measurement, ↑unit • Hyponyms: ↑long measure, ↑astronomy unit, ↑ …   Useful english dictionary

  • Topic outline of astronomy — Astronomy is the science of celestial objects ( e.g. , stars, planets, comets, and galaxies) and phenomena that originate outside the Earth s atmosphere. It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial …   Wikipedia

  • Astronomical unit — This article is about unit of length. For the full system of units, see Astronomical system of units. 1 astronomical unit = SI units 149.60×10^6 km 149.60×10^9 m Astronomical units 4.8481 …   Wikipedia

  • List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

  • Julian year (astronomy) — In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of 86,400 SI seconds each, totalling 31,557,600 seconds. That is the average length of the year in the Julian calendar used in Western… …   Wikipedia

  • Babylonian astronomy — According to Asger Aaboe, the origins of Western astronomy can be found in Mesopotamia, and all Western efforts in the exact sciences are descendants in direct line from the work of the late Babylonian astronomers.[1] Our knowledge of Sumerian… …   Wikipedia

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