Gamma-Ray Pulsars/Milky Way (IMAGE) Naval Research Laboratory Caption The positions of the cataloged pulsars shown in a top-down view of the Milky Way. The red and orange symbols indicate millisecond pulsars, while the green and blue symbols indicate young, unrecycled pulsars. Some radio-quiet pulsars (blue symbols) do not have well measured distances, so their positions only indicate the direction towards these pulsars. Credit Photo By: Reid; M. J; et al.; Harvard-Smithsonian Center for Astrophysics Usage Restrictions No restrictions. License Public Domain 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.