Short of the Prime Directive, I believe we are the first in this section of
the Milky Way.
Ronald
On Friday, March 6, 2020 at 10:03:21 AM UTC-5, John Clark wrote:
>
> Galactic clusters are the largest structures in the universe held together
> by gravity and the Ophiuchus Supercluster contains 4021 known galaxies,
> it's likely none of them contain life, much less intelligent life.
> Telescopes have seen evidence that the largest galaxy in the center of the
> cluster underwent a gargantuan explosion at least 240 million years
> earlier, it's 390 million light years away so the explosion happened at
> least 630 million years ago. It's thought that 270 million solar masses of
> gas and dust was sucked into the black hole at the center of the galaxy
> producing something equivalent to a supernova going off every month for a
> 100 million years. Something like that would probably sterilize not only
> the galaxy but the entire cluster. And Ophiuchus is relatively nearby so
> it's almost certain there are more distant clusters that suffered even
> larger explosions. It looks like the Milky Way has just been lucky.
>
> DISCOVERY OF A GIANT RADIO FOSSIL IN THE OPHIUCHUS GALAXY CLUSTER
> <https://www.icrar.org/wp-content/uploads/2020/02/2002.01291.pdf>
>
> John K Clark
>
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