Stelle Azzurre

A supermassive star with high temperatures (our sun is orange at 6000 degrees) of about 30000 degrees and 10 times larger than our sun, when a blue star dies it's trouble, it turns into a supernova and when it explodes, you feel it. Theories about nearby supernovae that have influenced the cycles of mass extinctions on our planet? In ancient times, the Chinese saw one, bright in broad daylight!