Terraforming
Videos
Terraforming or Earth-shaping is the hypothetical process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet, moon, or other astronomical body to be simil
An artist's conception shows a terraformed Mars in four stages of development.
Artist's conception of a terraformed Mars
True-color image of Venus. To terraform, this dense atmosphere will need to be removed.
Artist's conception of a terraformed Venus
Ocean world
Videos
An ocean world, ocean planet, water world, or water planet is a type of planet or natural satellite that contains a substantial amount of water in the form of oceans, as part of its hydrosphere, eithe
Earth's surface is dominated by the ocean, which forms 71% of Earth's surface. Thus, Earth can be considered a water world, although not a fully oceanic world.
Diagram of the interior of Enceladus. Ice crust Global ocean Rocky core The southern polar region shows active jets.
A set of exoplanets of varying size containing water, compared with the Earth (artist concept; 17 August 2018)
Atacama Large Millimeter Array image of HL Tauri, a protoplanetary disk