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Science

qazplm135

(7,654 posts)

12. would we necessarily observe such a civilization?

Reply to exboyfil (Reply #4)

Wed Oct 10, 2018, 05:07 PM

Oct 2018

If it's an already created Dyson sphere for example, we wouldn't see it, and the gravity of one star in another galaxy is not going to be noticeable from where we are.

Wouldn't we have to more or less catch them mid-sphere creation to see it?

I still wonder if we aren't one of the first civilizations. You'd need a second or third iteration of a star in an area to have all the metals and elements necessary for life. That takes billions of years. Then you need billions of years to get to highly organized life one would think.

A billion here, a billion there, pretty soon it adds up in a 13+ billion year old universe.

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Highlight:

Telescopes pick up huge number of unexplained signals coming from alien galaxies [View all] Judi Lynn Oct 2018 OP

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If those signals are ETI comms they are very energetically wasteful Loki Liesmith Oct 2018 #2

Sounds like a natural phenomenon exboyfil Oct 2018 #5

I agree but I'll hope otherwise Loki Liesmith Oct 2018 #8

Unfortunately its a futile hope as no truly interstellar civilization is likely cstanleytech Oct 2018 #13

If the civilization is like ours I'd agree Loki Liesmith Oct 2018 #16

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What I find interesting is that no Type III civilizations exboyfil Oct 2018 #4

Or technological civilizations are inherently unstable and prone to self-destruction... Moostache Oct 2018 #10

would we necessarily observe such a civilization? qazplm135 Oct 2018 #12

Depends on the material used to construct the dyson sphere plus where it is located. cstanleytech Oct 2018 #14

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That or some sort of merger. cstanleytech Oct 2018 #15

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