Active SETI

In contrast to passive eavesdropping sending signals known as Active SETI or METI (Messaging to Extra-Terrestrial Intelligence) has been called. Researchers, such as the astrophysicist Stephen Hawking and David Brin speculate but that Active SETI could also be associated with significant risks. There are plans for a planetary defense. The risk assessment of a transmitted signal, the San Marino Scale was created. After the ten -point scale in 1974 sent Arecibo message, level would be 8

List of Embassies

This list gives an overview about the messages aliens for possible recipients Location. See also experiments with aliens to contact