The mass-radius relationship refers to the correlation between the mass and radius of a planet, which can provide insights into its composition, structure, and density. This relationship helps scientists categorize exoplanets, particularly distinguishing between types like super-Earths and mini-Neptunes, as well as understanding how tightly packed planets can be in a given system. It also plays a role in understanding dynamic processes involving gravitational interactions, such as the Kozai-Lidov mechanism.
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