In a spiral galaxy these

См. также в других словарях:

• Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …   Wikipedia

• Barred spiral galaxy — A barred spiral galaxy is a spiral galaxy with a central bar shaped structure composed of stars. Bars are found in approximately half of all spiral galaxiescite book author=J. Binney, S. Tremaine year=1987 title=Galactic Dynamics… …   Wikipedia

• Grand design spiral galaxy — A grand design spiral galaxy is a type of spiral galaxy with prominent and well defined spiral arms, as opposed to multi arm and flocculent spirals which have subtler structural features. The spiral arms of a grand design galaxy extend clearly… …   Wikipedia

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …   Wikipedia

• Galaxy morphological classification — Artist s concept illustrating bulge no bulge spiral galaxies. Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance. There are several schemes in use by which galaxies… …   Wikipedia

• Galaxy rotation curve — The rotation curve of a galaxy can be represented by a graph that plots the orbital velocity of the stars or gas in the galaxy on the y axis against the distance from the center of the galaxy on the x axis. Stars revolve around the center of… …   Wikipedia

• Galaxy Zoo — Infobox Website name = Galaxy Zoo caption = url = http://www.galaxyzoo.org commercial = No type = Volunteer Scientific Project language = English, Polish registration = Yes owner = Galaxy Zoo Team author = Galaxy Zoo Team launch date = 12 July… …   Wikipedia

• Spiral — In mathematics, a spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point.piral or helixA spiral and a helix are two terms that are easily confused, but represent different objects …   Wikipedia

• Galaxy formation and evolution — The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have… …   Wikipedia

• spiral — 01. The birds were flying loops and [spirals] through the trees, and across the sky. 02. Most of the galaxies in the universe have a [spiral] shape. 03. We put a [spiral] binding on the book, so it could be opened and lain flat on a desk. 04.… …   Grammatical examples in English