What might be considered the oldest government computer is more than 12 billion miles from Earth.

There were two Voyager probes launched in 1977. They both have 69.63 kilobytes of total computer memory on board. That is almost exactly equal to the memory required for the illustration of Voyager in this post. They still work because were set to overwrite old data once it has been sent to Earth.

Artist's Concept of Voyager

Artist’s impression of Voyager 1  – image via WikiMedia Commons

The Voyager program was to study the outer Solar System. Oddly, Voyager 1 launched 16 days after its twin, Voyager 2. It has been sending data for 39 years. It still communicates with the Deep Space Network to receive routine commands and return data.

It was 135 AU (2.02×1010 km) from the Sun as of June 2016, making it the farthest spacecraft from Earth.

Voyager 1 visited Jupiter and Saturn before a flyby of Saturn’s moon Titan set it on a trajectory out of the solar system. Voyager 2 also visited those planets before heading to Uranus and Neptune. It is currently in the Heliosheath, a zone in the outer limits of the Sun’s magnetic field.

You may remember Voyager because each probe carries a gold-plated audio-visual disc in the event that the spacecraft is ever found by intelligent life forms from other planetary systems. I wrote about the discs in my “Hello Aliens!” post. The “records” have photos of the Earth and its lifeforms, scientific information, spoken greetings from Earthlings, “Sounds of Earth” audio with whales, a baby crying, waves breaking on a shore, and music (including works by Mozart, Blind Willie Johnson, Chuck Berry, and Valya Balkanska, Eastern and Western classics and indigenous music from around the world.   It also has a greeting to the aliens in 55 different languages.

record_is_attached_to_voyager_1

gold-plated disc being attached to Voyager 1

The Voyager probes are not the only artificial objects we have launched that are leaving the Solar System. There is a pretty large list of space probes and their upper stages launched by NASA the aliens might come across out there. And we have others closer to home that are in orbit around planets or around the Sun.

More at wikipedia.org/wiki/Voyager_1

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