Largest Megastructures in Sci-Fi

[Rattler5150]

dyson sphere,, I win

 

[Harkonnen64]

I was going to say my dick, but since we're talking about fiction it doesn't count.

 

[someonehairy-ish]

I'm pretty sure Khorne's fortress is WH40k is effective infinite because it covers a whole plane of existence. But then again, it is in the immaterium so it might not technically have an area/diameter/volume at all.

 

[direkiller]

Wasn't the Dyson barrier (We are talking about Pandora's Star here right?) 30 AUs across, one one side of the barrier? One AU being the distance from here to the sun.

Dyson anything is older then Pandora's star

http://en.wikipedia.org/wiki/Freeman_Dyson
http://en.wikipedia.org/wiki/Dyson_sphere

 

[Heronblade]

Wouldn't it be a Dyson Sphere? I mean, stars are pretty big, and you'd have to build an enclosure around one...

We're already way beyond Dyson Sphere's my friend. Look at the above posts!

I don't know how big a Dyson Sphere would actually BE.

Also RE: the MiB pendant, Frank said it himself that it's very very small.

A full blown Dyson sphere, rather than a simple Dyson swarm, would be a relatively thin sphere shaped structure built around a star. Its actual size would vary greatly based upon the radius.

A relatively small one built with a radius of 1 astronomical unit (about 8 light minutes, same radius as Earth's orbit) would have a surface area of approximately 270 x 10^15 square kilometers. Some proposed dyson spheres in scifi are MUCH larger, having a diameter of several light months, and are large enough to enclose multiple stars.

Why the hell would anyone build such a thing? Well, for starters, the smaller sphere I mentioned around our own star would intercept nearly 400 yottawatts of energy, or 400 x 10^24 joules per second, about 33 trillion times more than the amount we produce and consume yearly.

 

[Daverson]

Ringworld. If it's not the largest, it's the largest that could actually exist.

 

[Racecarlock]

The place where they construct planets in The Hitchhiker's Guide To The Galaxy is 13 light seconds across, or 3,897,301,954 metres. Which would be... 190,870,132,282,126,866,381.2 m[sup]2[/sup]. So, roughly 190.87 quintillion m[sup]2[/sup].

Your move.

I was going to go with death star, but your selection just made it shit itself.

So I'm going to go with that part in gurren laggan where the two robots grow to galaxy size. Yep, galaxy sized giant robots. Fuck science, this is awesome. I agree with the show.

 

[Olas]

I know it doesn't come close to the size of some of these, but the Minecraft world deserves some mention. From end to end it's 64,000 kilometers across with a surface area of 4,096,000,000 kilometers. That's 8 times the surface area of the planet earth.
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