This image of Nova Cygni 1992 was obtained with the aid of the Faint Object Camera and the corrective optics apparatus (COSTAR) installed on the Hubble Space Telescope during the First Servicing Mission. Compared with the picture taken in May 1993, it is much clearer. It shows that the ring had expanded from a diameter of 118 billion kilometers (74 billion miles) to 154 billion kilometers (96 billion miles) and had become less round. In addition, the mysterious diagonal bar seen in the May 1993 image had vanished.
Camera: Faint Object Camera with COSTAR
Credit: F. Paresce (STScl and ESA), R.
jedrzejewski (STScl), NASA, and ESA
