Illustration of EXAFS Detection (IMAGE) Astronomy & Astrophysics Caption This is an artist impression of X-rays from a far-away source (top right) intercepted by an interstellar dust particle (yellow square), in which emittance and absorption of electrons between neighboring atoms causes a sinusoidal behavior in the observed X-ray spectrum. (lower left). The top right shows a drawing of the XMM satellite. Credit Copyright A&A 2009 Usage Restrictions The image may only be used with appropriate credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.