As the Hubble Space Telescope nears its 20th birthday, its value for research and the public understanding of science is reaching an unprecedented peak. Few celebrities have been the subject of so many biographies and movies by the time they turn 20.The best of the bunch, in print and on the big screen, is arguably hitting the market right now, less than a year after a major upgrade left Hubble in the best shape it's ever been.Read Alan Boyle's commentary about the Hubble IMAX film here: cosmiclog.msnbc.msn.com/archive