NASA had launched a Golden Disc to Extraterrestrial living organisms in space

 Golden Disc In Voyager 1

NASA had launched VOYAGER 1 in 1977, and left the Solar System in November 2004. The Voyager is carrying a Golden Disc a gold plated copper disk 12 inch contains many information about Earth and diversity of life and culture on Earth.

The Voyager Golden Record contains sounds and images selected to display the Diversity of Life and Culture on Earth. These records are like a Time Capsule for any intelligent extraterrestrial life who may find them.

The contents of the records includes songs of birds and whales. Spoken greetings in 55ancient and modern languages. Variety of natural sounds such as those made by surf, wind, thunder, and animals. And more like other human sounds, footsteps, and laughter. The record also includes a message from US president.

The collection of photographs includes images and diagrams both in black and white, and colour. The first scientific images showing mathematical and physical quantities of the solar system and its planets, human anatomy and reproduction, and DNA. Pictures of humanity and also some of animals, insects, plants and landscapes. Some images shows food, architecture, and humans day to day lives.

The Golden Record also have an hour long recording of the brainwaves. The 115 images are encoded in form and composed of 512 lines.

The record is constructed of gold plated copper and its cover is aluminium and electroplated with uranium-238. Uranium has a half life of 4 billion years. The records also had the inscription “ To the makers of music – all worlds, all times”.

In a left hand corner of this record, there is a drawing of phonograph record. The drawing indicates that the record should be played from the outside in. The information of the cover is designed to show how pictures are to be constructed from signals. The pictures are made from these signals which traces the picture as a series of vertical lines, similar to analog television. Colour Images were representd by three images in sequence, one each for red, green and blue components of the image.