The Pancha Tattvas

Before explaining what the pancha tattvas are, there is a story to help you to remember the relationship between the pancha tattvas and planets.

The first step for a new thing produced is a demand. An idea comes up because of a demand.
We need a theory (survey, etc,) to support that idea. This is ether.
A theory is passed, then we start to design, develop, test, etc. These actions are air.
After a new thing produced, we need to let people know this new thing. This is fire.
When people accept this new thing, the new thing will be mass produced and salesmen will popularize or push the new thing to the market. This is water.
When this new thing is one of our necessities. This is earth.

Pancha is meant five and Tattva is meant element.
The five elements are Ether, Air, Fire, Water, and Earth.
Ether - Jupiter
Air - Saturn
Fire - Mars, Sun
Water - Venus, Moon
Earth - Mercury