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Show Astronomer Finds New Star Dust Rings in the Milky Way CAMBRIDGE, MASS. Three tremendous rings of star-dust, star-dust, hitherto unknown planetary plane-tary nebulae, have been found in the Milky Way by Mrs. Muriel M. Seyfert of the Harvard Har-vard college observatory. Each of them Is believed to be hundreds of times larger than our entire solar system, yet they are so far distant they can be seen only through moderately powerful telescopes. Even then the rings are not visible to the human eye but can only be detected by sensitive photographic plates where they appear ap-pear as luminous rings surrounding brilliant nucleus stars. Billion Mile Diameter. Actually the tremendous nebulae are not rings but spheres or balls of expanding gas and tiny particles, some of them as fine as molecules. From their appearance on plates, however, astronomers have named llietn "ring nebulae." Mrs. Seyfert's iliscoveries were made through an examination of plates taken at Harvard's Har-vard's station at Bloemfontein, South Africa. While sufficient data have not yet been assembled to permit accurate calculation of the size and distance dis-tance of the rings, Harvard observers ob-servers believe that like most of the approximately 130 known planetary plan-etary nebulae, those found by Mrs. Seyfert are several hundred light years away from the earth and have a diameter that is expressed in billions of miles. i |