"How Advanced Alien Civilizations Would Conquer..." Topic

… the Galaxy – Fermi paradox.

"…The Concept of Dyson Spheres is nothing new to many of us. I read this earlier and honestly didn't think anything new was presented, then it dawned on me, Since many well known scientists/theoretical physicists and respected mathematicians openly discuss the concept of Dyson Spheres. Are there ANY present programs/probes actively searching for either these spheres outright or for sings of the existence?

Seems that if this is a viable possibility how would they know if they are looking at one or something that is assumed to be a Rocky Giant? How would one even look? IF an Alien Civ has completely surrounded their Star or solar System would that even be possible to spot with our present level of Tech?…"

Full thread here.
link

Amicalement
Armand

I say a Ringworld is a better choice.

Nah, Ringworlds are unstable, need tons of material and you have to use a non-existent material to make.

Halo worlds are better. Smaller, you can place them slightly angled to the plane of the elliptic and now have day/night cycles with out shadow squares, can be built with existing materials and you can move 'em.

Watch the Science [NOT the SyFy !!!!!!]Channel … they talk about this type of thing all the time …

I am an advanced alien civilization…and I'm not telling :P

There are isolated tribes living all over the world that live inside other countries. Technically, what is their status? Coquered, even though they've never mest 'civiised' man? Annexed?

Perhaps we are an isolated tribe living inside some Pan Galactic country?

neutron weapons.

Perhaps we are an isolated tribe living inside some Pan Galactic country?

Nice one! Kind of like David Brin's "Uplift" series, ignored until you paddle out into the shipping lanes in your dugout canoe and attract attention…

The easiest way is to crash a fake UFO with advanced tech and sit back, while they destroy themselves.

The real question is, why would they bother? What do we have that they'd want?
(Okay, aside from our beautiful women.)

Money or women, it was always for that! (smile).

Amicalement
Armand

Is there enough physical matter in the solar system to make a Dyson Sphere? Or would you have to 'eat' a few dozen other solar systems to obtain enough mass/matter?

I thought Stronty Girl asked an interesting question, so I did a few calcs in excel.

Volume of a Sphere = 4/3*Pi*Radius^3
Volume of a shell (Dyson's Sphere) would be the outside sphere volume minus the inner sphere volume. so
4/3*Pi*(Ro^3 – Ri^3)
where Ro = Outer Sphere Radius and Ri = Inner Sphere Radius.

Plug in a few knowns to play with like;

Radius of the Earth = 6,371 Km
Radius of the Earth Orbit = 149,600,000 Km

The result is to make a 1m thick Dyson's Sphere you'd need something like 260 Earth volumes of materials.

Jupiter's Radius = 69,911 Km

Materials equal to the volume of Jupiter would give you a Dyson's Sphere about 5m thick.

So yes, I'm thinking you'd need more solid matter than our primary solar system contains to make a Dyson Sphere that you could live in. On the other hand if the sphere is just to capture the total energy output of our sun for use by a habitat orbiting near the Sphere, maybe you could make it work with available materials? Not sure what all the Dyson Sphere theories propose about their purposes.

*One more big assumption here is that I did the math right. :-)

Good question and better answer.
Thanks you.

Amicalement
Armand

It sux to be the last kid in the galactic quadrant to be chosen for sides for the celestial dodge-asteroid game!

Think of the surface area inside (and outside) a Dyson sphere. How many do you have to build to house your civilization until the heat death of the universe?

About 2.636 x 10^17 square kilometers in area.

Earth total surface area (land plus water) = 5.1 x 10^8 square kilometers

That makes the Dyson sphere equal to about 516 million earths. 516 million planet empire would be pretty big…