Some 501 photos, drawings and text messages were transmitted on Thursday by a giant radio-telescope in Ukraine normally used to track asteroids.
The target planet was chosen as it is thought capable of supporting life.
Any reply to the messages – collated through a competition by the social networking website Bebo – would not reach Earth for 40 years.
The competition – A Message From Earth – invited Bebo’s 12m users to send in missives they would like extra-terrestrials to receive.
Read the rest of the article at: BBC.
