
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in approximately two-thirds of all spiral galaxies. Bars generally affect both the motions of stars and interstellar gas within spiral galaxies and can affect spiral arms as well. Edwin Hubble classified spiral galaxies of this type as ....
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http://en.wikipedia.org/wiki/Barred_spiral_galaxy

is a spiral galaxy that has a centric bar-shaped configuration made-up of stars.
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http://planetfacts.org/space-terms/

(from the article `Cosmos`) A similar explanation probably underlies the barred spiral galaxies, with the basic underlying disturbance being an oval distortion. The predicted ... The luminosities, dimensions, spectra, and distributions of the barred spirals tend to be indistinguishable from those of normal spirals. The ... ...Ellipti...
Found on
http://www.britannica.com/eb/a-z/b/24
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