News dated
On 10 November, NASA announced public activities for a milestone expected on 18 November 2026: Voyager 1 should reach one light-day from Earth, about 25.9 billion kilometres. This is the distance light travels in 24 hours, not a light-year or the time the spacecraft took to get there. As of 12 November, it remains a future milestone. [1][2]
The spacecraft launched in 1977. NASA has announced a mission-team discussion for 19 November, also available online, about the science and challenges of keeping such long-lived spacecraft operating. The milestone offers an opportunity to explain measurement and maintenance work that continues far beyond launch day. [1][2]
The bright side
A mission launched in 1977 still offers public opportunities to understand distances, instruments and space research. [1][2]
One idea, in simple words
Voyager 1 is a spacecraft launched from Earth in 1977. NASA expects it to reach a distance of one light-day from Earth on 18 November 2026. A light-day is the distance light travels in 24 hours: about 25.9 billion kilometres. It does not mean the spacecraft has travelled for just one day. Getting that far has taken many years. On 12 November, this milestone is still ahead. NASA has also announced a public discussion with the mission team for 19 November. For example, think about the difference between the length of a road and how long you take to travel along it. Here, the journey of light helps us describe an enormous distance. [1][2]
A little discovery to keep
What did you discover?
Straight from the source.
- NASA Invites Media, Public to Join Voyager 1 One-Light Day Activities NASA · 10 Nov 2026
- Where are Voyager 1 and Voyager 2 Now? NASA · 10 Nov 2026
Original reporting summaries prepared with AI assistance and accessible sources. Our editorial method.
