Q&A: Chandra Mission
Will there be a future, different Chandra telescope?
A future X-ray telescope in the planning stage is Constellation
X. It has more area, but less ability to make sharp images. It
will be a fleet of 4 observatories and is intended to be 1.5
million miles from Earth. See their web site at: http://constellation.gsfc.nasa.gov/public/index.html