- astronomical constant
- астрономическая постоянная
English-russian dictionary of physics. 2013.
astronomical constant
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Astronomical constant — An astronomical constant is a physical constant used in astronomy. The astronomical constants include units of astronomical distance (the astronomical unit (A.U.), the light year (ly), and the parsec (pc)), units of time (the sidereal year, the… … 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
astronomical unit — Astron. a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km). Abbr.: AU [1900 05] * * * ▪ unit of measurement Comparative data for the Sun, planets, and other solar system… … Universalium
Constant — Con stant, n. 1. That which is not subject to change; that which is invariable. [1913 Webster] 2. (Math.) A quantity that does not change its value; used in countradistinction to {variable}. [1913 Webster] 3. (Astron.) A number whose value, when… … The Collaborative International Dictionary of English
Constant of aberration — Constant Con stant, n. 1. That which is not subject to change; that which is invariable. [1913 Webster] 2. (Math.) A quantity that does not change its value; used in countradistinction to {variable}. [1913 Webster] 3. (Astron.) A number whose… … The Collaborative International Dictionary of English
Constant of integration — Constant Con stant, n. 1. That which is not subject to change; that which is invariable. [1913 Webster] 2. (Math.) A quantity that does not change its value; used in countradistinction to {variable}. [1913 Webster] 3. (Astron.) A number whose… … The Collaborative International Dictionary of English
Astronomical distance — Astronomical distances are distances in outer space, occurring on a much larger scale than those on Earth. For instance, the distance to (Proxima Centauri), the closest star to our solar system, is about 40,000,000,000,000 kilometers.For this… … Wikipedia
Astronomical seeing — Schematic diagram illustrating how optical wavefronts from a distant star may be perturbed by a layer of turbulent mixing in the atmosphere. The vertical scale of the wavefronts plotted is highly exaggerated. Astronomical seeing refers to the… … Wikipedia
Astronomical units of length — Astronomers use a number of different length units for different objects. The length unit used is typically determined by two criteria: #the unit should create manageable numbers #the unit should be easily derivable from observationThe distances… … Wikipedia
astronomical unit — noun The mean distance from the Earth to the Sun (the semi major axis of Earths orbit), approximately 149,600,000 kilometres (symbol AU), used to measure distances in the solar system.<! do not include encyclopaedic information; this is not… … Wiktionary
astronomical mean sun — An imaginary body, which is assumed to travel around equinoctial at a constant rate, completing one orbit in the same time the earth takes to complete one orbit around the ecliptic. Also known as the mean sun … Aviation dictionary
