Super-Earth

Due to this low mass, it can be categorized as a super-Earth.

Alternatively, the planet may be a super-earth.

It is speculated that this planet may either be an ice giant like Uranus, or a "naked super-Earth" with a solid icy or rocky surface.

COROT-7b is a rocky super-Earth.

The National Science Foundation announced on September 29 the discovery of a fourth super-Earth (Gliese 581 g) orbiting the M dwarf star Gliese 581.

With a minimum mass just 18 times that of the Earth, the planet is likely a "hot Neptune" planet, a small Jovian planet, or possibly a large terrestrial planet (a super-Earth).

In mid-December 2009, a team of Harvard-Smithsonian astronomers announced the discovery of a companion extrasolar planet, GJ 1214 b, potentially composed largely of water and having the mass and diameter of a super-Earth.

One of them, HD 40307 g, is a super-Earth in the habitable zone, with orbital period about 200 days, and might be capable of supporting liquid water on its surface, with additional observational information necessary before habitability can be determined.

The 2007 discovery of Gliese 581 c, the first super-Earth in the circumstellar habitable zone, created significant interest in the system by the scientific community, although the planet was later found to have surface conditions that likely resemble Venus more than Earth.

A study on Gliese 876 d by a team around Diana Valencia revealed that it would be possible to infer from a radius measured by the transit method of detecting planets and the mass of the relevant planet what the structural composition of a relevant super-Earth is.

Some relatively lightweight exoplanets, only a few times more massive than Earth (now known by the term Super-Earth), are known as well; statistical studies now indicate that they actually outnumber giant planets while recent discoveries have included Earth-sized and smaller planets and a handful that appear to exhibit other Earth-like properties.