Gamma-ray (Figure 2) (IMAGE) Nagoya University Caption Figure 2. Maps of gamma-ray intensity Ng, interstellar gas density Np, and X-ray intensity Nx Credit Astrophysics Laboratory, Nagoya University Usage Restrictions This image may be used with appropriate credit. License Original 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.