Click on the image below to launch the .swf file. Then, click on the yellow hotspots and roll over the blue and green hotspots to explore how the GRaND instrument works.

GRaND Instrument

The Gamma Ray and Neutron Detector (GRaND) instrument interactive illustrates how scientists learn about the composition of an asteroid by studying energy and neutrons that emanate from it. The Dawn spacecraft contains three instruments (GRaND, Visible Infrared Spectrometer, and the Framing Camera) that will provide new answers to questions about the formation and evolution of the early solar system.