Voyager 1 reaches one light-day from Earth

On November 18 at 11:16, the Voyager 1 spacecraft will pass a distance so vast that light takes one full day to travel it, marking a historic milestone for human exploration.

Live broadcast to follow the event

One hour before this moment, at 10:15, the French science program Ciel & Espace will begin a live broadcast to track Voyager 1’s crossing of this significant distance in real time.

Voyager 1's historic journey

Launched in 1977, Voyager 1 was one of two space probes sent to explore the giant planets of the Solar System. It is now the farthest human-made object from Earth, having traveled over 26 billion kilometers.

Communication delay at this distance

At this point, radio signals sent from Earth to Voyager 1 will take one full day to reach the probe, and any responses from the spacecraft will be received on Earth the following day by NASA’s radio antennas.

A special broadcast for a historic moment

On this symbolic day for human space exploration, Ciel & Espace will provide a dedicated live broadcast on its YouTube channel, marking the moment when humanity’s reach extends one light-day beyond Earth.