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Name: AnnMarie
Status: other
Grade: other
Location: NV
Country: N/A
Date: N/A
Question:
How often do supernova occur?

Replies:
In our galaxy, rarely. The last two were in 1572 and 1604. In all the many many galaxies we search through around the world, perhaps 30 or 40 a year or more.

David Levy


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