Message from Earth Inhabitants

Spacecraft Pioneer 10 and 11 carry a plaque (plaque) that contains the message of humanity in the hope that one day the plane was carrying placards with this will be found by intelligent beings from other civilizations beyond Earth.
Plaque contains sketch drawings of men and women who stood in front of the plane. Right-hand man raised as a sign of good faith. Posture of men and women depicted is the result of computer analysis of the posture of the average human being on Earth
The key to translate the contents of these plaques is the understanding of the separation of the most common element in the universe: hydrogen. This element is illustrated in the upper left corner of the placard in the form of a perfect scheme showing the transition of neutral hydrogen atoms. Anyone who comes from a scientifically educated civilization and have sufficient understanding of the hydrogen will be able to translate this message. Plaque was designed by Dr. Carl Sagan, an astrophysicist from Cornell Univerity and drawn by his wife, Linda Salzman Sagan.