News Snapshot:
A 900-year-old cosmic mystery surrounding the origins of a supernova first spotted over China in 1181 has finally been solved. A faint, fast expanding nebula called Pa30 has been identified as the source of the 12th century explosion, which Chinese and Japanese astronomers said was as bright as the planet Saturn and remained visible for six months. Experts said Pa30, which surrounds Parker's Star — one of the hottest stars in the Milky Way — fits the profile, location and age of the historic supernova. Astronomers have solved a 900-year-old mystery surrounding the origins of a supernova first spotted over...
