Exoplanets in the universe
Some are much more common than others
Up to 2.5-times the radius of the Earth, these planets orbit much closer to their star, and so have lost most of their early atmosphere to solar evaporation.
Hot Neptunians Neptunians have a rocky core, and are up to 50-times the mass of Earth, but also have a thick atmosphere of hydrogen and helium.
Roughly the same size as Earth, but because they are in the hot zone, liquid water is not present on the exoplanet's surface.
Once thought unlikely, it now seems that more than 65 per cent of Jupiter-sized planets form in their star’s hot zone.
Warm Superterrans Planets in the habitable zone only account for about 1.4 per cent of those discovered so far, and the majority of them are larger than our home planet.