Stunning Echo of 800-year-old Explosion nasa.gov/image-article/stunnin… #NASA #ChandraXRayObservatory #MarshallSpaceFlightCenter #Stars #Supernovae #TheUniverse
Stunning Echo of 800-year-old Explosion - NASA
In the year 1181 a rare supernova explosion appeared in the night sky, staying visible for 185 consecutive days. Historical records show that theNASA