irregular cluster

irregular cluster

See regular cluster.

irregular cluster

[i′reg·yə·lər ′kləs·tər]
(astronomy)
A type of galaxy cluster that has an overall amorphous appearance, usually showing little overall symmetry or central concentration and often composed of several distinct clumps of galaxies.
References in classic literature ?
The village street--if street that could be called which was an irregular cluster of poor cottages of many heights and ages, some with their fronts, some with their backs, and some with gable ends towards the road, with here and there a signpost, or a shed encroaching on the path--was close at hand.
Far off, a little thing in the sunshine, and rushing down as if some one was bending it hollow, was the beach and the irregular cluster of houses that constitutes Dymchurch.
Here he stopped for a minute, to look at the strange, irregular clusters of lights piled one above the other, and twinkling afar off so high, that they looked like stars, gleaming from the castle walls on the one side and the Calton Hill on the other, as if they illuminated veritable castles in the air; while the old picturesque town slept heavily on, in gloom and darkness below: its palace and chapel of Holyrood, guarded day and night, as a friend of my uncle's used to say, by old Arthur's Seat, towering, surly and dark, like some gruff genius, over the ancient city he has watched so long.
The remaining Risk Irregular cluster (N=96) had irregularities in comparison to the effects of the Risk informers of the total group, since the panels showed no (for Personal Risk) or inverse (for Societal Risk) effects of the two Risk informers in contrast to Figure 1 and the three other clusters.
01) and similar to them the subjects of the remaining so called irregular Risk Irregular cluster assigned 0.
It is a poor, irregular cluster with some 20 certain members: three spirals (the Galaxy, M31, and M33); four irregulars (LMC, SMC, IC 1613, and NGC 6822); and about 13 intermediate or dwarf ellipticals (NGC 147; NGC 185; NGC 205; M32; the Sculptor, Fornax, Leo I and II, UMi, and Draco systems; and the three companions to M31).
For example, much housing consisted of an irregular cluster of stone and mud-brick one storey structures.
The big, irregular cluster is supposed to be the disheveled hair of the Egyptian queen Berenice II, who lived in the 3rd century BC.
Through 14 x 70 binoculars, 20 to 25 stars gather into a very loose, irregular cluster 1/2[degrees] across.
Much of the housing in other parts of Turkey consisted of an irregular cluster of stone and mud-brick one-storey structures, sometimes lacking proper facilities and utilities.
Although primary carcinomas may be poorly differentiated the cytological features which favored metastatic poorly differentiated carcinoma were the presence of benign hepatocytes, necrosis along with irregular clusters and dissociated malignant cells.
In contrast, he says, astronomers have typically observed either individual "superbubbles" some 15 to 20 times larger or irregular clusters of smaller bubbles that have one-tenth the diameter.