Voyager 1 — Amazing Facts

~1 Light-Day

from Earth — a signal takes nearly 24 hours to reach Voyager 1

~170 AU · ~25.4 billion km · ~15.8 billion miles

Distance & Speed

17 km/s

That's 38,000 mph — fast enough to cross the entire United States coast-to-coast in about 4 minutes.

~22.5 hours

The time it takes a radio signal, traveling at the speed of light, to travel from Earth to Voyager 1 and back: nearly 2 full days.

73,000 years

At its current speed, it would take this long to reach the nearest star (Proxima Centauri) — if it were heading that way.

170 AU

If the Sun were a basketball, Voyager 1 would be ~2.5 miles away. The nearest star? About 4,300 miles.

Engineering Marvels

49 years

Launched September 5, 1977 — still transmitting data. Most software gets deprecated in 5 years; Voyager keeps going.

23 watts

Voyager's radio transmitter is about the power of a refrigerator light bulb — yet NASA can still hear it from 25 billion km away.

~70 KB memory

The onboard computer has less memory than a single low-resolution JPEG image. Your phone has roughly 2 million times more.

160 bits/sec

Current data rate from Voyager 1. It would take about 2 hours to download a single smartphone photo at this speed.

Scientific Firsts

Interstellar Space

First human-made object to leave the heliosphere and enter the space between stars, on August 25, 2012.

Volcanoes on Io

Voyager 1 discovered active volcanoes on Jupiter's moon Io — the first extraterrestrial volcanic activity ever observed.

Saturn's Rings

Revealed incredible detail in Saturn's ring structure, discovering intricate patterns, gaps, and previously unknown moons.

~0.01 cm⁻³

The electron density Voyager measures in interstellar space — the thin plasma filling the vast emptiness between stars.

The Golden Record

55 Languages

Carries a gold-plated copper phonograph record with greetings in 55 human languages, from Akkadian to Wu Chinese.

90 min of Music

From Bach to Chuck Berry, Beethoven to Blind Willie Johnson — a playlist chosen to represent all of humanity's music.

115 Images

Encoded analog images of humans, DNA, our solar system, mathematical definitions, and scenes of life on Earth.

1 Billion Years

The estimated lifespan of the Golden Record in the vacuum of space — long after Earth's continents have rearranged.

"The spacecraft will be encountered and the record played only if there are advanced space-faring civilizations in interstellar space, but the launching of this bottle into the cosmic ocean says something very hopeful about life on this planet." — Carl Sagan

Fun Comparisons

Older than most colleagues

Voyager 1 has been traveling longer than most people in the room have been alive. It launched when Star Wars first hit theaters.

Pale Blue Dot

In 1990, Voyager 1 turned its camera back toward Earth from 6 billion km away and took the famous "Pale Blue Dot" photo — Earth as a tiny speck in a sunbeam.

Your phone vs. Voyager

A modern smartphone has ~100,000× the computing power of Voyager's onboard computer, yet Voyager is exploring interstellar space.

Still phoning home

Voyager 1's RTG power source loses ~4 watts per year. NASA expects to keep at least one instrument running until ~2030.