A-Z Popular Blog Space Search »

What is a Dyson Sphere?

 , updated on
A Dyson Sphere is a hypothetical megastructure that completely encases a star, thus capturing all its energy. Such a structure might potentially have other functions such as a habitat on its surface or interior. A Dyson sphere positioned one astronomical unit from our sun would have a surface area of 550 million times that of the Earth and would generate approximately 33 trillion times as much power as the world currently consumes in a year.
It is well beyond the current technology and resources of human civilization to construct a Dyson sphere. It has been suggested that Dyson spheres could theoretically exist as a need for energy may drive technologically advanced extraterrestrial civilizations towards this solution.

Dyson swarm

The Dyson sphere has many theoretical variations that are mostly ways to partially surround a star. For example, a Dyson swarm are a network of small units that orbit a sun in various theoretical configurations. Due to the unfathomable size of a Dyson sphere it is often assumed that they would be built out incrementally.

Stellar Engines

A Dyson sphere might potentially use some of its energy to travel through space. Using a star as an energy source for propulsion is a hypothetical technique known as a stellar engine.
Overview: Dyson Sphere
A hypothetical megastructure that completely encases a star as a means of energy production with potential use as a large scale artificial world.
Attributed to
Freeman Dyson
Related Concepts


This is the complete list of articles we have written about space.
Astronomical Unit
Deep Space
Fermi Paradox
Karman Line
Space Age
Space Environment
Space Industry
Space Junk
Space Things
The Moon
More ...
If you enjoyed this page, please consider bookmarking Simplicable.

Fermi Paradox

The Fermi Paradox explained.


A list of existing, proposed and hypothetical spacecraft.


An overview of piggybacks in transportation.


The common types of orbit.

Speed Of Light

An overview of the speed of light with examples.

Space Industry

An overview of the space industry with examples.


The definition of inertia with examples.

Electromagnetic Spectrum

An overview of the common wavelengths of the electromagnetic spectrum.


A list of the branches of physics.

Space Things

A list of astronomical objects and phenomenon.

Robotics vs Artificial Intelligence

The different between robots and AI.

Vertical Farming

An overview of vertical farming.


An overview of superintelligence.


A definition of yobibyte with a chart of comparisons to other data sizes.

Artificial Intelligence Examples

Common examples of artificial intelligence.

Technology Examples

The definition of technology with examples.

Technology Theory

A list of interesting technology theories.

Technology Change

An overview of technology change with examples.
The most popular articles on Simplicable in the past day.

New Articles

Recent posts or updates on Simplicable.
Site Map