TBO.com: Tampa Bay Online.
Monday, Oct 24, 2016
AP Florida

Telescopes solve 2,000-year-old stellar mystery

CAPE CANAVERAL - Astronomers finally know why the first documented supernova was super-sized. The exploded star was observed by the ancient Chinese in the year 185, and visible for eight months. It was later found to be a bigger-than-expected supernova remnant, 8,000 light years away. Each light year is about 6 trillion miles. New observations in the infrared show the explosion took place in a cavity in space. The cavity allowed the stellar shrapnel to shoot faster and farther out into the universe. The star — similar to our sun — died peacefully and turned into a dense white dwarf. It sucked up material from another star, and then exploded in a supernova.
NASA announced the findings Monday. Four space telescopes were used in the study. ——— Online: NASA: http://www.nasa.gov/mission—pages/spitzer/multimedia/pia14872.html