1. Pluto has a natural satellite named Charon.

2. Pluto has five known natural satellites, of which Charon is the largest.

3. Charon's diameter is about half the diameter of Pluto.

4. Its average radius is 606 km (377 mi).

Explain: -Internal profit are made to firms when they expand their products. High level productivity, labour-division and modern equipments when used in better way, then internal profit is made. They are called as internal because firms increase their quality & quantity of production then only they gain internal profit.

Income which is not produced by any production process  is called transfer income. It is generally money received by  an individual or family from the state or other body, often the  pension or unemployment benefit.