Labels:grandstand | monitor | mouse | plant | ptyalith | sky | sun | tree OCR: AL gravitationallv bound svstem of stars composing an "island universe' separated from other such groups by great distances There are about one billion galaxies within photographic range from Farth Galaxies have various shapes, sizes and luminosities The Milky Way Galaxy or simply the Galax comprises about 100 billion stars approximately 100, .000 light years in diameter The Sun appro> ximately 33,000 light years from the center and tak million years complete an orbit We cla ssify galaxies as spirals such as the Milky Way or Andromeda M31 ellipticals such the giant galaxy in Virgo, (M87) or irregular Galaxies can be further described giants or dwarfs The LO0 Group galaxies consists about 30 mostly dwar ellipticals and dwarf irregulars, bound one another gravitationally The Milky Way and th ...
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