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Iron Planet. By Krischan

Iron Planet

An iron planet is a type of planet that consists primarily of an iron-rich core with little or no mantle. Mercury is the largest celestial body of this type in the Solar System (as the other terrestrial planets are silicate planets), but larger iron-rich exoplanets may exist. Iron-rich planets may be the remnants of normal metal/silicate rocky planets whose rocky mantles were stripped away by giant impacts.Read More

Mini Neptune. By Krischan


A Mini-Neptune is a planet of up to 10 Earth masses, less massive than Uranus and Neptune, which have about 14.5 and 17, respectively. Mini-Neptunes have thick hydrogen-helium atmospheres, probably with deep layers of ice, rock or liquid oceans made of water, ammonia, a mixture of both, or heavier volatiles. These planets have small cores made of low-density volatiles.Read More

Rogue Planet. By Krischan

Rogue Planet

A rogue planet, also known as an interstellar planet, nomad planet, free-floating planet, orphan planet, wandering planet or starless planet, is a planetary-mass object that orbits the galaxy directly. They have either been ejected from the planetary system in which they formed or have never been gravitationally bound to any star or brown dwarf. There may be billions of rogue planets in the Milky Way. Interstellar planets are not lit or heated by a star.Read More

Super Earth. By Krischan


A Super-Earth is an extrasolar planet with a mass higher than Earth’s, but substantially below the mass of the Solar System’s ice giants Uranus and Neptune, which are 15 and 17 Earth masses respectively. The term Super-Earth refers only to the mass of the planet, and does not imply anything about the surface conditions or habitability. The alternative term gas dwarfs may be more accurate.Read More

Carbon Planet. By Krischan

Carbon Planet

A carbon planet is a type of planet that contains more carbon than oxygen. Carbon planets could form if protoplanetary discs are carbon-rich and oxygen-poor. They would develop differently from Earth, Mars, and Venus, which are composed mostly of silicon-oxygen compounds. Such a planet would probably have an iron- or steel-rich core like the known terrestrial planets. Surrounding that would be molten silicon carbide and titanium carbide.Read More