How thick would a Dyson sphere need to be?

By building structures at twice the Earth-sun distance, the material would be sufficient to construct a huge number of orbiting platforms 6 to 10 feet (2 to 3 meters) thick, allowing the aliens to live on their star-facing surface.

Is a Dyson sphere physically possible?

Maddox points out that a Dyson sphere is physically impossible. To keep this shell in orbit around the Sun at any distance in the Habitable Zone would require some force counteracting gravity and pushing outwards on the sphere. So even though it is a sphere, it’s not actually a sphere.

Is there enough material to build a Dyson sphere?

The inner system contains enough usable material for a dyson sphere. If one assumes a 1 AU radius, there will be around 42 kg/m^2 of the sphere.

How does a Dyson swarm work?

Unlike a shell-like Dyson sphere, a Dyson swarm would be composed of living habitats, satellites, and solar energy collectors orbiting like a net around a star. Energy would be transferred wirelessly between the individual components and Earth. He estimated that roughly half of the planet would be usable.

How hard would it to build a Dyson sphere?

Not only would a Dyson shell block 99.99 percent of visible light, but it would require an extraordinary amount of stellar material to simply build it — perhaps more material than is in the entire solar system. Additionally, it wouldn’t take much to perturb the structure’s orbit.

Would a Dyson swarm block out the sun?

Actually no. You see to have enough mass to build a Dyson Sphere you would need to dismantle all the planets and asteroids to use as construction material. So there would be no worry of blocking sunlight from reaching the Earth, because what remained of the Earth would be part of the Dyson Sphere.

How long would it take to build a Dyson sphere?

The rule of thumb for big projects is to base it on the doubling time. So if it takes 1 year to double the set of machines/collectors, and you start with 1 square meter’s worth, you would reach the scale of a 1.0 AU Dyson sphere in about 79 years that way.

What is gravity at a point inside a spherical shell?

The net gravitational force on a point mass inside a spherical shell of mass is identically zero! This proves that the force from any spherically symmetric mass distribution on a mass inside its radius is zero.

What it is the gravitational force on a body inside a spherical shell Why is it so?

Inside the shell, the net gravitational force is zero. This is because there is no mass inside, the gravitational field is zero, thereby force is zero.