> On a serious note, how is it that the planet has 4 times the mass of Earth but the surface gravity is "the same or slightly higher" than Earth's? It could be

> On a serious note, how is it that the planet has 4 times the mass of Earth but the surface gravity is "the same or slightly higher" than Earth's? It could be bigger than Earth: http://www.wolframalpha.com/input/?i=surface+gravity+of+4+earth+mass+and+2+earth+radius http://www.wolframalpha.com/input/?i=surface+gravity+of+4+ea...