Super-Earth

A super-Earth is a planet more massive than Earth yet well short of Neptune's size, typically up to about twice Earth's radius. The name is only about heft and size: it says nothing about temperature or whether the world is anything like Earth. A super-Earth can just as easily be a scorched lava ball or a frozen rock.

They are among the most common worlds the galaxy makes, and our own solar system has none, which is part of what makes them so interesting. Above roughly this size, a planet tends to hold onto a thick hydrogen envelope and cross over into being a sub-Neptune instead. gravityfinder sizes each world from its measured radius and computes the gravity you would actually feel standing on it.