Saturn Nebula (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Saturn Nebula" in English language version.

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arxiv.org

Steffen, W.; Espíndola, M.; Martínez, S.; Koning, N. (October 2009). "The 3D velocity structure of the planetary nebula NGC 7009". Revista Mexicana de Astronomía y Astrofísica. 45: 143–54. arXiv:0905.2148. Bibcode:2009RMxAA..45..143S. NGC 7009 is a planetary nebula with several morphological and kinematical sub-systems with multiple shells, a halo, jet-like streams, ansae and small-scale filaments and knots.

Steffen, W.; Espíndola, M.; Martínez, S.; Koning, N. (October 2009). "The 3D velocity structure of the planetary nebula NGC 7009". Revista Mexicana de Astronomía y Astrofísica. 45: 143–54. arXiv:0905.2148. Bibcode:2009RMxAA..45..143S. NGC 7009 is a planetary nebula with several morphological and kinematical sub-systems with multiple shells, a halo, jet-like streams, ansae and small-scale filaments and knots.