Perseus-armen

Perseus-armen er en af to store spiralarme i Mælkevejsgalaksen. Den anden store arm kaldes Centaurus-armen. Perseus-armen begynder fra den distale ende af den lange bjælke.^[1] Afstanden mellem solsystemet og Perseus-armen er tidligere antaget at være 13.000 lysår væk, men menes nu at være 6.400 lysår.^[2]

^ Churchwell, Ed; Babler, Brian L.; Meade, Marlin A. (2009). "The Spitzer/GLIMPSE Surveys: A New View of the Milky Way" (PDF). Publications of the Astronomical Society of the Pacific. 121 (877): 213-230. Bibcode:2009PASP..121..213C. doi:10.1086/597811.
^ McKee, Maggie (8. december 2005). "Spiral arm of Milky Way looms closer than thought". New Scientist. Reed Business Information Ltd. Hentet 31. oktober 2013.

[Churchwell2009-1] Churchwell, Ed; Babler, Brian L.; Meade, Marlin A. (2009). "The Spitzer/GLIMPSE Surveys: A New View of the Milky Way" (PDF). Publications of the Astronomical Society of the Pacific. 121 (877): 213-230. Bibcode:2009PASP..121..213C. doi:10.1086/597811.

[2] McKee, Maggie (8. december 2005). "Spiral arm of Milky Way looms closer than thought". New Scientist. Reed Business Information Ltd. Hentet 31. oktober 2013.

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