"XMM-Newton is a joint NASA-European Space Agency (ESA) orbiting observatory, designed to take observe high energy X-rays emitted from exotic astronomical objects such as pulsars, black holes and active galaxies." Educators can find numerous classroom materials including a ruler illustrating many of the X-ray images obtained by XMM-Newton, an activity and background material for the Supernova Educator Unit, and links to many NASA mission teacher resources. The website offers archived videos and images of the making of XMM as well as news articles from the XMM-Newton science team.