News of the WeekAstronomy

Fly's Eye Spies Highs in Cosmic Rays' Demise

See allHide authors and affiliations

Science  19 May 2000:
Vol. 288, Issue 5469, pp. 1147
DOI: 10.1126/science.288.5469.1147a

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Summary

LONG BEACH, CALIFORNIA-- In 1991, astronomers at the Fly's Eye observatory in Utah detected a cosmic ray packing 320 exa-electron volts (EeV) of energy, the same punch as an 88-kilometer-an-hour baseball pitch. Now, observations from Fly's Eye's replacement have shown that the 320-EeV monster was not a freak of nature. This month at an American Physical Society meeting here, astronomers from the High-Resolution Fly's Eye detector, or HiRes, announced that they had found a handful of ultrasuperhigh-energy cosmic rays that deepen the mystery about the origin of these strange particles.