Q&A: Chandra Mission

Q:
What is the diameter of Chandra's X-ray lens and who designed it?

A:
The x-ray mirrors were designed by Chandra Telescope Scientist Leon van Speybroeck. A tribute and summary of his contributions may be found at:
http://chandra.harvard.edu/press/advisories/03_advisories/press_010203.html

The largest of the 4 sets of nested mirrors is 1.2 meters wide at its widest point. For more details, please see:
http://chandra.harvard.edu/resources/faq/chandra/chandra-21.html
View full specifications of the Chandra Observatory:
http://chandra.harvard.edu/about/specs.html