Nebulosa de Hélix (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nebulosa de Hélix" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

18^th place

51^st place

2^nd place

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6,480^th place

159^th place

doi.org

dx.doi.org

Hora, Joseph L.; Latter, William B.; Smith, Howard A.; Marengo, Massimo (2006). «Infrared Observations of the Helix Planetary Nebula». The Astrophysical Journal. 652 (1). pp. 426–441. doi:10.1086/507944
O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A. (2002). «Knots in Nearby Planetary Nebulae». The Astronomical Journal. 123 (6). pp. 3329–3347. doi:10.1086/340726

exame.com

«NASA captura incrível imagem do `Olho de Deus`». Exame. 6 de outubro de 2012. Consultado em 21 de maio de 2021

harvard.edu

adsabs.harvard.edu

Hora, Joseph L.; Latter, William B.; Smith, Howard A.; Marengo, Massimo (2006). «Infrared Observations of the Helix Planetary Nebula». The Astrophysical Journal. 652 (1). pp. 426–441. doi:10.1086/507944
O'Dell, C. R.; Balick, B.; Hajian, A. R.; Henney, W. J.; Burkert, A. (2002). «Knots in Nearby Planetary Nebulae». The Astronomical Journal. 123 (6). pp. 3329–3347. doi:10.1086/340726