extrasolar planets

A new extrasolar planet is as hot and dense as mercury, but 2.5 times the mass of earth

A new extrasolar planet is as hot and dense as mercury, but 2.5 times the mass of earth

In the course of searching for planets beyond our Solar System – aka. extra-solar planets – some truly interesting cases have been discovered. In addition to planets that are several times the size of the Solar System’s largest planet (Super-Jupiters), astronomers have also found a plethora of terrestrial (i.e rocky) planets that are several times the size of Earth (Super-Earths).