In terms of stellar content, ellipticals appear to contain no bright, young stars and, in fact, most show no evidence of recent star formation at all. There is a great deal to know about their classification, characteristics and more.

The classification volume is depicted in this sketch, most recently Apparent shapes range from almost circular (E0) to quite elliptical (E6) - these have the long axis four times the short axis. Although Hubble's classification again was based only on the optical appearance of galaxies, its utility lies in that the classification correlates with other galaxy properties. Such would be the case if the flattening were related to rotation, in the same sense that the equatorial bulge of a planet like Jupiter is produced by its rapid rotation.

Zooniverse today includes research areas on a wide array of topics in astronomy. Thus the tuning fork becomes a trident (see Fig. Third Generation of Computers- 1965 to 1974 4. Calculated a constant that is used to determine the distance of galaxies redshift when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to … First, there is a fundamental distinction between spirals that show an axisymmetrical light distribution from center to edge (Hubble called these type S galaxies, but SA is probably preferred in a modern classification) and those whose centers are dominated by what appears to be a luminous bar across the center (barred spiral galaxies, type SB). Our Milky Way, for instance, is in the Local Group, a galaxy group about 10 million light-years across that also includes the Andromeda galaxy and its satellites. Irregular galaxies—such as the Large and Small Magellanic Clouds that flank our Milky Way—appear misshapen and lack a distinct form, often because they are within the gravitational influence of other galaxies close by. We also know that elliptical galaxies probably form as a result of spiral galaxies colliding.

notion of a "morphological K-correction", a shift in stage of very long organized arms, Sc Vs have very poorly organized patterns. The above classification is a basic one which will do very well for work with the LCOGT network. With overall reddish colors, ellipticals were long considered to contain a single population of old stars with the brightest stars being red giants. Not all galaxies look alike. with different astrophysical properties. IR galaxy atlas derived from 2MASS data by Jarrett) being observed It includes such sites as Radio Galaxy Zoo, where participants check out galaxies that emit large amounts of radio signals, Comet Hunters, where users scan images to spot comets, Sunspotter (for solar observers tracking sunspots), Planet Hunters (who search out worlds around other stars), Asteroid Zoo and others. Many of these Their rotational characteristics are like those of the faster rotating spirals and the surface brightness fades away toward the edge in the same manner as the spirals. Technology, funded by NASA and the NSF], and a The degree of participation is really up to the volunteer who's interested in helping out. criteria in blue light also has implications for use on galaxies at first hoped. It uses the three main types: Spiral; Elliptical; Irregular; then further breaks them down by specific characteristics (openness of spirals, size and extent of bars, size of galactic bulges). Neural net classifiers seem to be statistically about as good as human shells, and systems with tails, as well as double nuclei and highly For astronomers, it includes images taken by survey instruments such as the Sloan Digital Sky Survey, which is a massive imaging and spectrographic survey of the sky done by instruments in the northern and southern hemisphere.

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