Creating a Planet class

As we build our Solar System, it will be useful to abstract out a Planet class to be used for each planet.

Planets have a number of different attributes that define their unique characteristics in addition to their texture resource IDs. Planets have a distance from the Sun, size (radius), and an orbital speed. Planets all orbit around the Sun as their origin.

• The distance will be its distance from the Sun measured in millions of kilometers.

• The radius will be the planet's size in kilometers (actually in millions of kilometers, to be consistent).

• Rotation is the rate at which the planet rotates about its own axis (one of its days).

• Orbit is the rate at which the planet rotates about the Sun (one of its years). We will assume a perfectly circular orbit.

• TexId is the resource ID of the texture image for the planet.

• origin is the center of its orbit. For planets, this will be the Sun's transform. For a moon, this will be the moon's planet.

The Solar System is a really big thing...