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scopes not as stellar point sources, but as small diffuse disks, that they were so named.
For a long time the explanation for the Ring Nebulas appearance was that the hazy disk was so much brighter around its edges that it looked like a ring, that we are looking through the rim of the gaseous shell lengthwise. Therefore, there is much more gas in our line of sight and the refraction of the light from the central star makes it more luminous, because each particle acts as a
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