Hypothetical planet types

extrasolar terrestrial planet

hypothetical class of celestial objects resulting from the stripping away of a gas giant's hydrogen and helium atmosphere and outer layers

rocky planet with very little water

A planet with a helium-dominated atmosphere

hypothetical type of planet that may be better-suited for life than Earth is

extrasolar terrestrial planet without a core

thumb |Artist's impression of the view of the sky from a planet orbiting inside the dust disk around the supermassive black hole in the center of the galaxy NGC 4261.

hypothetical type of tidally locked planet with spatial features resembling an eyeball