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Terrestrial or Super-Earth exoplanets that orbit extremely close to their stars causing surface temperatures high enough to melt rock, forming lava oceans. An example is 55 Cancri e.

Smaller than Neptune but larger than Earth, these exoplanets are likely to have thick hydrogen-helium atmospheres and rocky cores. Examples include Kepler-11f and K2-18b.

Planets that do not orbit a star, having being ejected from their original planetary systems or formed in isolation. Examples are difficult to confirm, but PSO J318.5−22 is a candidate.

Planets with a core and a thick mantle made of ices, like water, ammonia, and methane, surrounded by an atmosphere. Examples include Uranus and Neptune in our solar system, but no exoplanet examples are conclusively identified.

Planets with a mass larger than Earth's but smaller than that of Uranus or Neptune. Known for their potential to have solid surfaces or thick atmospheres. Examples include Gliese 1214 b and HD 85512 b.

A class of exoplanets that are similar in characteristics to Jupiter but orbit very close to their stars, resulting in very high surface temperatures. Examples include 51 Pegasi b and HD 189733 b.

Planets that orbit around two stars instead of one, reminiscent of Tatooine in 'Star Wars'. Examples include Kepler-16b and Kepler-47c.

Rocky surface, similar in composition to Earth, often found in the inner part of planetary systems. Examples include Kepler-10b and LHS 3844b.

Large planets with deep gaseous atmospheres, lacking a well-defined solid surface. Examples include Jupiter-like exoplanets such as HD 209458 b, also known as Osiris.