Number 177 (Story #4), May 3, 1994 by Phillip F. Schewe and Ben Stein CCD TROUBLES FOR HUBBLE CAMERAS : The charge-coupled devices used to electronically image stars and galaxies on the refurbished Hubble Space Telescope have been exhibiting an output variability as large as 10%. Hubble scientists believe this problem can be solved. (Science News, 23 April 1994.)