The New Encyclopaedia Britannica, Volume 23Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 381
... galaxies , including the galaxy in which Earth is located . The roughly spherical halo of the Milky Way is thought to have a radius of some 50,000 light - years ( about 5 x 1017 kilometres ) , and its gas is a source of radio emission ...
... galaxies , including the galaxy in which Earth is located . The roughly spherical halo of the Milky Way is thought to have a radius of some 50,000 light - years ( about 5 x 1017 kilometres ) , and its gas is a source of radio emission ...
Page 383
... galaxies , designated E , are numbered from 0 to 7 on the basis of their ellipticity ; i.e. , an EO galaxy appears spheri- cal , and an E7 has a long axis three times greater ( the maximum ratio observed ) than its shortest one . SO ...
... galaxies , designated E , are numbered from 0 to 7 on the basis of their ellipticity ; i.e. , an EO galaxy appears spheri- cal , and an E7 has a long axis three times greater ( the maximum ratio observed ) than its shortest one . SO ...
Page 384
galaxy , irregular 384 galaxy , irregular , any of the 2 or 3 percent of galaxies that do not show a definite spiral or elliptical form . Typical irregular galaxies lacking any apparent structure are the Magel- lanic Clouds , companion ...
galaxy , irregular 384 galaxy , irregular , any of the 2 or 3 percent of galaxies that do not show a definite spiral or elliptical form . Typical irregular galaxies lacking any apparent structure are the Magel- lanic Clouds , companion ...
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