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  2. Artificial planet - Wikipedia

    en.wikipedia.org/wiki/Artificial_planet

    An artificial planet [1] (also known as a planetary replica or a replica planet) [2] is a proposed stellar megastructure. Its defining characteristic is that it has sufficient mass to generate its own gravity field that is strong enough to prevent atmosphere from escaping , [ 3 ] [ 4 ] although the term has been sometimes used to describe other ...

  3. List of hypothetical Solar System objects - Wikipedia

    en.wikipedia.org/wiki/List_of_hypothetical_Solar...

    Planet V, a planet thought by John Chambers and Jack Lissauer to have once existed between Mars and the asteroid belt, based on computer simulations. Various planets beyond Neptune: Planet Nine, a planet proposed to explain apparent alignments in the orbits of a number of distant trans-Neptunian objects. Planet X, a hypothetical planet beyond ...

  4. Terraforming - Wikipedia

    en.wikipedia.org/wiki/Terraforming

    An artist's conception shows a terraformed Mars in four stages of development.. Terraforming or terraformation ("Earth-shaping") is the hypothetical process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet, moon, or other body to be similar to the environment of Earth to make it habitable for humans to live on.

  5. Terraforming of Venus - Wikipedia

    en.wikipedia.org/wiki/Terraforming_of_Venus

    Artist's conception of a terraformed Venus.The cloud formations are depicted assuming the planet's rotation has not been accelerated. The terraforming of Venus or the terraformation of Venus is the hypothetical process of engineering the global environment of the planet Venus in order to make it suitable for human habitation.

  6. Cool Globes: Hot Ideas for a Cooler Planet - Wikipedia

    en.wikipedia.org/wiki/Cool_Globes:_Hot_Ideas_for...

    Cool Globes: Hot Ideas for a Cooler Planet is a public art project dedicated to increasing awareness of global warming.. A nonprofit corporation, "Cool Globes: Hot Ideas for a Cooler Planet" sponsored a Chicago public art exhibit of 125 5-foot-diameter (1.5 m) globes decorated with solutions to global warming, placed in Grant Park near the Field Museum of Natural History, the Shedd Aquarium ...

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  8. Fictional planets of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Fictional_planets_of_the...

    Schematic diagram of the orbits of the fictional planets Vulcan, Counter-Earth, and Phaëton in relation to the five innermost planets of the Solar System.. Fictional planets of the Solar System have been depicted since the 1700s—often but not always corresponding to hypothetical planets that have at one point or another been seriously proposed by real-world astronomers, though commonly ...

  9. Planetary engineering - Wikipedia

    en.wikipedia.org/wiki/Planetary_engineering

    A common object of discussion on potential terraforming is the planet Mars. To terraform Mars, humans would need to create a new atmosphere, due to the planet's high carbon dioxide concentration and low atmospheric pressure. This would be possible by introducing more greenhouse gases to below "freezing point from indigenous materials". [2]