The Radius of a planet is the distance from its center to its edge. The radius is given in units of meters. The Density of a planet is the ratio of a planet's mass to its volume. The units of density are kilograms per meters cubed. The Oblateness of a planet is how much is has been flattened by its rotation.
Oblateness is unitless.
The Spin Period is the time that it takes the planet to spin once on its axis. The Spin Period is given in units of seconds. The Surface Gravity is the acceleration due to gravity on the surface of the planet. The units of surface gravity are meters per seconds squared. The Escape Velocity is the velocity a body needs to escape the gravity of the planet and get out into space.