1. Bishop Ring:
Envisioned as a modified version of a space habitat by Forrest Bishop of the Institute of Atomic-Scale Engineering, the Bishop Ring is a gigantic structure that encircles a star at a distance similar to Earth's orbit.
It serves as a habitable space habitat, complete with an artificial atmosphere and simulated gravity.

2. Dyson Sphere:
Conceived by astrophysicist Freeman Dyson, this structure is either a system of satellites or a continuous shell that completely surrounds a star to capture most of its energy output.
The Dyson Sphere is designed to maximize the use of a star's energy resources to support an advanced civilization with vast energy needs.

3. Stellar Engine:
This refers to a class of hypothetical megastructures intended to physically move a star and its associated planets.
An example is the Shkadov Thruster, which utilizes the pressure of the star’s radiation to create an asymmetric thrust, allowing the star's movement through the galaxy.

These extraordinary constructions remain beyond our current technological capabilities, but they inspire discussions and research in the field of advanced space engineering.

....At the moment, we admire some of them in Science Fiction Movies.

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