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Holmberg radius |
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Holmberg radius [′hōm‚bərg ‚rād·ē·əs] (astronomy) The radius of an external galaxy at which the surface brightness is such that the light emitted from one square arc-second equals that from a star of magnitude 26.6. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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