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* The gases consist of about 90% hydrogen, with the remainder made up of helium, oxygen, nitrogen, and other elements. The clouds have a mean density of 10<sup>2</sup>–10<sup>6</sup> particles/cm³. Its central regions are relatively denser. | * The gases consist of about 90% hydrogen, with the remainder made up of helium, oxygen, nitrogen, and other elements. The clouds have a mean density of 10<sup>2</sup>–10<sup>6</sup> particles/cm³. Its central regions are relatively denser. | ||
− | == History | + | == History == |
− | The position of the Lesser Shell Nebula has been cataloged as part of the [[University of Selasia]] [[Spinward Survey]]. The nebula is a separated pocket of gas and dust located around two parsecs from the [[Greater Shell Nebula]]. | + | The position of the Lesser Shell Nebula has been cataloged as part of the [[University of Selasia]] [[Spinward Survey]]. |
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+ | The nebula is a separated pocket of gas and dust located around two parsecs from the [[Greater Shell Nebula]]. | ||
=== Image Repository === | === Image Repository === |