Supernova 1994D and the Unexpected Universe . ... Credit Copyright: High-Z Supernova Search Team , HST , NASA Explanation: Long ago, far away, a star exploded. ... Supernova 1994D was not of interest for how different it was, but rather for how similar it was to other supernovae . ... If all Type 1a supernovae have the same intrinsic brightness, then the dimmer a supernova appears, the farther away it must be. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...