Elliptical GalaxiesPosted on the 02 May 2011 by Gabe12logan
In elliptical galaxies account for about 13%. They are denoted by the letter E, and numbered with axis ratio of spheroids. They are homogeneous and mostly without interstellar matter. Stars move in the complex 3-dimensional trajectories with different represented speeds.
Elliptical galaxies are classified according to how flattened they look. E0 galaxy is very round, and E7 galaxy is very flattened. The number following the letter "E" defines galactic "ellipticity" - the ratio of large and small axis of the galaxy. Galaxies with large ellipticity have higher numbers.
Elliptical galaxies are built mainly of red and yellow stars, giants and dwarfs, but lacks the blue and white supergiants. Gas is almost absent in elliptical galaxies since stars sucked it. The stars are mostly very old. Elliptical galaxy glow slightly decreases from center to periphery. These galaxies, if they rotate at all, do so very slowly.
Elliptical galaxies are unlike spiral a lot monotonous, and, of course, the elliptical shape. They do not contain much interstellar gas, which means it does not create conditions for the birth of young stars. They inhabit an old star that moves freely. What for them is very characteristic is that they greatly vary in size.
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