Assertion: cosmic ray's source | /r/HasProperty | identified
Facets:
Source sentences:
text: As reported in the article "Correlation of Highest Eneregy Cosmic Rays with Nearby Extragalactic Objects" ("Science" 318, p.938-943, summary p. 896, issue of 9 November 2007, a collaboration of 300 co-authors), such sources have now been identified--they are indeed outside our galaxy, and unusual.