avoidance, zone of

avoidance, zone of
Region of apparent absence of galaxies near the plane of the Milky Way Galaxy.

Millions of external galaxies are in this region of the sky but are obscured by interstellar dust within the Milky Way. The zone's obscuration can be penetrated at the infrared portion of the electromagnetic spectrum. See also infrared astronomy.

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      region characterized by an apparent absence of galaxies near the plane of the Milky Way Galaxy and caused by the obscuring effect of interstellar dust. It was so called by the American astronomer Edwin P. Hubble.

      The zone of avoidance is entirely a local Milky Way Galaxy effect. Surveys in the infrared and radio regions of the electromagnetic spectrum have shown that many external galaxies lie beyond it. The mass concentration known as the Great Attractor lies within it.

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Universalium. 2010.

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