Find Voyager
Use your phone’s direction, location and motion sensors to face humanity’s most distant spacecraft.
Voyager 1 · 1977—2026
One
Light
Day
On 18 November 2026, Voyager 1 will reach a remarkable symbolic horizon: the distance light travels in an entire day.
1977
Voyager 1 leaves Earth
2012
First spacecraft in interstellar space
2026
One light day from Earth
A digital monument
Humanity is still whispering.
For nearly half a century, Voyager 1 has travelled farther than any other human-made object. Its faint signal continues to cross the darkness toward home.
One Light Day turns distance into an experience: explore the journey, discover the Golden Record, meet Voyager in 3D, point toward it in the sky, and send a symbolic flash of light.
Send light
Begin with prime numbers, then transmit one short human word as flashes.
Carry Earth
Explore the sounds, music, images and scientific language of the Golden Record.
Free for everyone
Support the journey, only if you wish.
One Light Day has no advertising and no subscription. Every experience remains available to everyone. Optional contributions inside the app help us maintain and continue this independent monument; they never unlock features.
How voluntary support works →Continue listening
Signal Ark · SETI Explorer
Explore humanity’s search for signals beyond Earth through our companion project.
Visit Signal ArkAn open invitation
Science. Education. Art. Music. Memory.
We welcome cooperation with researchers, educators, museums, artists, musicians, observatories and people who share Voyager’s sense of possibility.
Start a conversation