Harvard University
Smithsonian Astrophysical: Chandra X Ray Observatory
Chandra X-Ray Observatory is an space observatory designed to detect x-rays. The public web site gives information about Chandra and X-ray astronomy in general (in field guide). It also gives educational materials for teachers.
Harvard University
Harvard Univ.: Chandra X Ray Observatory Center
The Chandra Observatory uses x-ray telescopes to learn more about the make-up of the universe. To learn more about x-ray telescopes and to see what they reveal, click here for the official Chandra X-ray Observatory website.
Harvard University
Harvard Smithsonian Center for Astrophysics: The Constellations
Based on images from the Chandra X-Ray Observatory, this is an excellent glossary of all the constellations, including the ones that make up the Zodiac. Find images, photographs, and an excellent background narratives concerning each...
NASA
Nasa: Marshall Space Flight Center: Chandra
NASA's Chandra X-ray Observatory site features a photograph and explanation of a "cool" black hole in the Andromeda Galaxy (M31).