extragalactic

• They are the features in the spectrum of protons propagating through CMB radiation in extragalactic space, and discovery of these features implies that primary particles are mostly extragalactic protons. —  CiteULike: Everyone's library
• The fifth edition of this successful undergraduate textbook has been extensively modernized and extended in the parts dealing with the Milky Way, extragalactic astronomy and cosmology as well as with extrasolar planets and the solar system (as a consequence of recent results from satellite missions and the new definition by the International Astronomical Union of planets, dwarf planets and small solar-system bodies). —  AvaxHome RSS:
• The energy spectrum is discussed in the context of different models of absorption from the diffuse extragalactic background radiation. —  CiteULike: Everyone's library
• "Measurements of the extragalactic background radiation are always hard to get, because this signal is very faint and, as a result, its detection is strongly dependent on how well one can remove the sources of contamination," says Angelica De Oliveira-Costa, an expert on cosmic background observations at the Massachusetts Institute of Technology. —  Scientific American
• A slight infidelity in this model might mimic an extragalactic signal. —  Scientific American

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