Imagine the Universe!
Imagine Home | Science |

Diffuse Background Quiz

  1. Above 1 keV, what is the dominant source of the soft X-ray background emission?


  2. At higher energies the sources of the diffuse background are mainly located in our galaxy.


  3. Much of the cosmic gamma-ray emission comes from


Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

DVD Table of Contents
Educator's Index