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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 superdense diamond planets.

All visualizations are based on calculating the radius and temperature of the planet, however other factors such as density, age, or "stellar metallicity" have also been taken into account. These visualizations are as close as possible to reality, however, the true nature of the exoplanets depicted can be fundamentally different.

Isn't it the incredible variety of alien worlds?