June 8th, 2009
Artist's illustration of a gamma-ray burst occurring in a dusty region of intense star formation. If a dust cloud lies between the burst and Earth, the optical light will be almost entirely absorbed, but the gamma-rays and X-rays will easily penetrate the dust. New evidence suggests that most "dark" gamma-ray bursts – those without optical afterglows – form in similar dusty environments. Credit: Aurore Simonnet/Sonoma State University, NASA Education & Public Outreach | Universe Today
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