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Messier 57: Difference between revisions
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M57 is an example of the class of planetary nebulae known as bipolar nebulae, whose thick equatorial rings visibly extend the structure through its main axis of symmetry. It appears to be a prolate spheroid with strong concentrations of material along its equator. From Earth, the symmetrical axis is viewed at about 30°. Overall, the observed nebulosity has been currently estimated to be expanding for approximately 1,610±240 years.<ref>[http://en.wikipedia.org/wiki/Ring_Nebula Ring Nebula]</ref> | M57 is an example of the class of planetary nebulae known as bipolar nebulae, whose thick equatorial rings visibly extend the structure through its main axis of symmetry. It appears to be a prolate spheroid with strong concentrations of material along its equator. From Earth, the symmetrical axis is viewed at about 30°. Overall, the observed nebulosity has been currently estimated to be expanding for approximately 1,610±240 years.<ref>[http://en.wikipedia.org/wiki/Ring_Nebula Ring Nebula]</ref> | ||
==HGS Session References== | |||
HGS Sessions - Clearing [[Temple Mount, Jerusalem.]] - 3/20/2015 <ref>HGS Session</ref> | |||