Over the past few decades, NASA has been shutting down non- essential instruments in order to conserve power. It could last until about 2030. Scientists planned for the craft to be on their own after that.

"When we don't have enough power to send a signal back to us, we'll continue in the same direction we've been in for hundreds of thousands of years," Suzanne Dodd said.

It's a small piece of the Earth that's traveling through our universe.

The golden record was a collection of human sounds and images meant to represent life on Earth for any alien civilization that may come across it.

The twin probes hurtled through space at a rate of 35,000 miles per hour, sending back detailed views of Jupiter, Neptune, and their moons. After completing grand tours of our solar system, Voyager 1 and 2 entered the outside world. They're the most distant objects made by humans.

This image of an astronaut in space was included in the Golden Record.
This image of astronaut Ed White during a spacewalk is part of the collection included on the golden record.

There is an aluminum case on the outside of each spaceship that protects a gold-plated copper record. NASA says the records communicate a story of our world to aliens.

Humanity's time capsule 

The golden records contain instructions in the universal language of math and science to show life on Earth to extraterrestrials.

An image from the Golden Record depicts humans drinking, licking and eating.
An image from the golden record depicts humans drinking, licking ice cream, and eating.
National Astronomy and Ionosphere Center (NAIC)

A woman licking an ice-cream cone, a man taking a bite out of a sandwich, and a man drinking water are some of the photographs contained in the 115Analog photographs. Photographs of the Taj Mahal, the Great Barrier Reef, and more are included in the record.

It has greetings in more than 55 languages and a 12-minute collection of sounds from Earth that include thunder, the calls of a whale, and a kiss. Chuck Berry's "Johnny B. Goode" is one of nearly 90 minutes of music from around the world on the Cosmic Mixtape.

A photo of a musical score with a violin was included on the record.
A photo of a musical score with a violin was included on the record.
National Astronomy and Ionosphere Center (NAIC)/Cornell University

Jimmy Carter wrote a letter when the twin probes started.

A token of our sounds, our science, our images, our thoughts and our feelings is what this is. Carter wrote that they are trying to survive their time so they may live into yours. Our hope and determination are represented in this record.

This image shows a woman looking at an x-ray photo of what seems to be her own hand. It was included in the Golden Record.
This image of woman looking at an X-ray photo of what seems to be her own hand, was included on the golden record.
National Astronomy and Ionosphere Center (NAIC)

Making a cosmic mixtape

Astronomer Carl Sagan, who helped design physical messages to send to space, was tapped by NASA to head the creation of the records. He asked scientists Timothy Ferris and Ann Druyan to record their own heartbeats and brain waves for the record.

The record will only be played if there are advanced space-faring civilizations in space. The launching of this bottle into the ocean says a lot about life on this planet.