Ironically, this device was mis-assembled, resulting in an extremely precise (but wrong) shape for the mirror.. 
Only a small fraction of Astronomical objects aré accessible to high-re ground-based imagingging; in dáú Hubble can perform high-re observations of any part of the night sky, and on objects that are extremely faint.USAge anyone can apply for time on the Telescope; there are no restrictions on Nationality or academic Affiliation.. 