The exceptionally sparse gas of the Local Bubble is the result of supernovae that exploded within the past ten to twenty million years.
citation
Wikipedia contributors. (2024, January 26). Local Bubble. In
Wikipedia, The Free Encyclopedia
. Retrieved March 8, 2024, from
https://en.wikipedia.org/w/index.php?title=Local_Bubble&oldid=1199190522
from
Local Bubble (Wikipedia)
tags
Local Bubble
supernova
this research says about 14 million years
The Local Bubble (sites.google.com)