- proper motion of a star
- Макаров: собственное движение звезды
Универсальный англо-русский словарь. Академик.ру. 2011.
proper motion of a star
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Proper motion — The proper motion of a star is its angular change in position over time as seen from the center of mass of the solar system.[1] It is measured in seconds of arc per year, arcsec/yr, where 3600 arcseconds equal one degree.[2] This contrasts with… … Wikipedia
proper motion — Astron. the angular motion of a star relative to a suitably defined frame of reference, expressed in seconds of arc per year. Cf. tangential motion. [1595 1605] * * * Apparent motion of a star across the celestial sphere at right angles to the… … Universalium
proper motion — noun Astronomy the part of the apparent motion of a star due to its actual movement in space relative to the sun … English new terms dictionary
proper motion — noun : the apparent change in position of a star usually expressed in seconds of arc per year that results from the projection on the celestial sphere of its motion with respect to the solar system see tangential motion … Useful english dictionary
proper motion — /prɒpə ˈmoʊʃən/ (say propuh mohshuhn) noun the component of a star s motion in space which is perpendicular to the line of sight …
Star — For other uses, see Star (disambiguation) … Wikipedia
Star designation — Designations of stars (and other celestial bodies) are done by the International Astronomical Union (IAU). Many of the star names in use today were inherited from the time before the IAU existed. Other names, mainly for variable stars (including… … Wikipedia
Star cluster — Star clusters are groups of stars which are gravitationally bound. Two distinct types of star cluster can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars, while open clusters generally contain less… … Wikipedia
Star catalogue — An illustration of the Perseus constellation (after Perseus from Greek mythology) from the star catalogue published by the German astronomer Johannes Hevelius in 1690 A star catalogue, or star catalog, is an astronomical catalogue that lists… … Wikipedia
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction either of two general types of stellar assemblages held… … Universalium
