moving clustern.
/ˌmuːvɪŋ ˈklʌstə/, U.S. /ˌmuvɪŋ ˈkləstər/ Astronomy.
1. An open cluster of stars which appear to share a common motion through space, and the distance of which can be determined from measurements of the motions of the individual stars.
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the world > the universe > constellation > star-cluster > [noun]
cluster1728
star cluster1829
stardust1836
star cloud1839
moving cluster1908
supercluster1924
1908 L. Boss in Astron. Jrnl. 26 31 (title) Convergent of a moving cluster in Taurus.
1914 A. S. Eddington Stellar Movements & Struct. Universe iv. 55 The most thoroughly investigated example of a moving cluster is the Taurus-stream, which comprises part of the stars of the Hyades and other neighbouring stars.
1930 H. Shapley Star Clusters 7 The so-called moving clusters are merely the brighter and nearer of the galactic types in which radial or transverse motions have been measured.
1966 Science 11 Feb. 679/3 A moving group of stars, like a moving cluster, presumably has a common origin in time and space.
2. attributive. Designating a method of determining the distance of such a star cluster by observing the radial velocities and proper motions of the individual stars.
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1968 T. L. Swihart Astrophysics & Stellar Astron. i. 60 The moving-cluster method is valuable in that it has appreciably increased the number of stars whose distances are reasonably well known.
1978 J. M. Pasachoff & M. L. Kutner University Astron. iii. 64 The moving cluster method is used, for example, to find the distances to the Hyades..or the stars that make up the Big Dipper.
1992 S. P. Maran Astron. & Astrophysics Encycl. 213/1 No spiral tracer lies close enough to have an accurate trigonometric or moving cluster parallax.
This is a new entry (OED Third Edition, March 2003; most recently modified version published online March 2022).
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n.1908