This visualization shows more than 500 exoplanets discovered before October 2015 (about 1/4 of all exoplanets), sorted according to their temperature and density.
Various well-known classes of exoplanets are shown on the graph, for example, super-lands, hot Jupiter, hot Neptunes, water worlds, gas dwarfs or super-dense planets of diamonds.
All visualizations are based on the calculation of the radius and temperature of the planet, but other factors such as density, age, or "stellar metallicity" were also taken into account. These visualizations are as close to reality as possible, but the true nature of the imaged exoplanets may be completely different.
Isn't it an incredible variety of alien worlds?