Two NASA space telescopes have helped solve some of the most enduring mysteries of the first documented report of star explosion — an ancient supernova spotted nearly 2,000 years ago, scientists say.

Two NASA space telescopes have helped solve some of the most enduring mysteries of the first documented report of star explosion — an ancient supernova spotted nearly 2,000 years ago, scientists say.

Some of the most dramatic events in the universe are supernovae, which happen either when massive stars run out of fuel and come to the end of their lives, or when a star in a binary feeds on its ...