Constellation-X
An X-ray observatory that will study supermassive black holes and the life cycles of matter throughout the Universe.
constellation.gsfc.nasa.gov
Cambridge X-Ray Astronomy Group
Research of the group focuses on observational studies of active galaxies, clusters of galaxies, elliptical galaxies, and the X-ray background.
www-xray.ast.cam.ac.uk
Yohkoh Public Outreach Project
Yohkoh satellite is an observatory for studying X-rays and gamma-rays from the Sun. Site features data including movies and a wealth of information about the Sun.
solar.physics.montana.edu/YPOP
X-Ray Interferometry
Use X-ray interferometry to observe objects in the sky. University of Colorado professor Webster Cash also provides instructions on how to build an X-Ray interferometer.
casa.colorado.edu/~wcash/interf/Interfere.htm
ASCA: Advanced Satellite for Cosmology and Astrophysics
X-ray spectroscopy of astrophysical plasmas, especially the analysis of discrete features such as emission lines and absorption edges.
heasarc.gsfc.nasa.gov/docs/asca