The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

Located at around 250 light years from Earth in the Draco constellation ... Around this star are two planets, a super-Earth and a sub-Neptune. These are types of planets that are absent from ...

An artist's impression of a super-Earth exoplanet ... is leftover heat from a planet's formation that seeps out from its interior and into its thick gaseous layer, heating it so that it can ...