![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/640px-Crab_Nebula.jpg&w=640&q=50)
Near-Earth supernova
Supernova close enough to have effects on the Earth's biosphere / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Near-Earth supernova?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
Main article: History of supernova observation
A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth (roughly less than 10 to 300 parsecs [30 to 1000 light-years] away[2]) to have noticeable effects on Earth's biosphere.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/640px-Crab_Nebula.jpg)
An estimated 20 supernova explosions have happened within 300 pc of the Earth over the last 11 million years. Type II supernova explosions are expected to occur in active star-forming regions, with 12 such OB associations being located within 650 pc of the Earth. At present, there are eight near-Earth supernova candidates within 300 pc.[3][4]