TL;DR
Prime made for students and young adults
- Fast, free delivery for dorm and study essentials
- Prime Video and Amazon Music included
- Member-only deals
NASA’s November skywatching notes say Voyager 1 is expected to pass the one-light-day distance from the Sun on Nov. 18, 2026. The milestone is a measure of distance—about 16.1 billion miles—not the time the spacecraft has been traveling.
NASA says Voyager 1 is expected to reach one light-day from the Sun on November 18, 2026, a distance of about 16.1 billion miles. The milestone, nearly 49 years after the spacecraft’s 1977 launch, marks how far the probe has traveled; a light-day is a unit of distance, not a measure of travel time.
NASA’s October 30 “November’s Night Sky Notes: Light-Day Away,” written by Kat Troche, reports that the Canberra antenna of NASA’s Deep Space Network was tracking Voyager 1 at 25.80 billion kilometers, or just over 16 billion miles, when the article was prepared. NASA gives November 18 as the projected date for the spacecraft to cross the one-light-day mark, defined in the article as 16.1 billion miles from the Sun.
Voyager 1 and its twin, Voyager 2, launched in 1977 to take advantage of a rare alignment of Jupiter, Saturn, Uranus and Neptune. NASA says the probes used six gravity assists between them to visit the outer planets. The spacecraft later followed separate routes: Voyager 1 made a final set of solar-system images, while Voyager 2 continued on to Uranus and Neptune.
Both craft carry a Golden Record, a 12-inch phonograph record with greetings in 55 languages, 27 musical tracks, 116 images and other sounds from Earth. NASA’s article describes protective metal layers and an etched cover that indicates the Sun’s position relative to 14 pulsars and provides instructions for playing the record.
A New Distance Marker for Voyager 1
The one-light-day mark makes the scale of Voyager 1’s journey easier to grasp. Light travels about 16.1 billion miles in a day, so the milestone also describes the distance a signal would have to travel from the spacecraft to Earth, before accounting for the return leg of a two-way exchange. It is not a change in the probe’s mission or a claim that the spacecraft will reach a new destination on that date.
NASA says it communicates with and tracks both Voyagers using the Deep Space Network. At such distances, signal travel time is an unavoidable part of contact with the probes. The milestone gives skywatchers and readers a concrete way to understand the probes’ separation from the Sun and the continuing work needed to monitor them.
The article also connects the distance milestone to the spacecraft’s cultural payload. The Golden Records were designed to carry information about Earth, including language, music and images. Their inclusion gives the mission a human message alongside its scientific observations, though NASA’s article presents the records as part of the mission’s history rather than as a new development.
Popular right now
Ninja Foodi Smart 6-in-1 Indoor Grill and Air Fryer, 4 Qt, FG551
Bose QuietComfort Wireless Noise Cancelling Headphones, Sandstone
Shark Clean & Empty Cordless Stick Vacuum with Auto-Empty System, BU3521
As an affiliate, we earn on qualifying purchases.
From Planetary Tour to Interstellar Space
Voyager 1 and Voyager 2 launched in 1977 during an alignment that allowed the spacecraft to use gravity assists at the four largest planets. NASA describes the mission as a “Grand Tour” that produced close-up views of the gas and ice giants and some of their moons. In the 1980s, the probes went their separate ways at Saturn: Voyager 2 continued to Uranus and Neptune, while Voyager 1 took additional images of the solar system.
The probes later crossed the heliopause, the boundary where the Sun’s solar wind meets the interstellar medium. NASA dates Voyager 1’s crossing to August 2012 and Voyager 2’s to November 2018. Those crossings are distinct from the one-light-day milestone: the heliopause marks a boundary in the space environment, while a light-day expresses distance.
NASA says the Golden Record’s cover includes etchings showing the Sun’s location relative to 14 pulsars and instructions for playing the record. The record uses copper and gold plating, and its aluminum cover was electroplated with a sample of uranium-238. The article gives uranium-238’s half-life as 4.468 billion years, a detail tied to the physical design of the message carried aboard each probe.
Tracking the November Milestone
NASA presents November 18 as the expected date for Voyager 1 to cross the one-light-day mark. The article does not provide a detailed calculation or explain how the date may shift as the spacecraft continues moving. Its reported distance of 25.80 billion kilometers is a tracking figure from the time the article was prepared, not a continuously updated position.
The article also does not give a separate current distance for Voyager 2 or specify how long communications with either spacecraft will continue. It confirms that NASA uses the Deep Space Network to communicate with and track both probes, but gives no new forecast about their operating lifetimes or future mission milestones.
NASA’s November Tracking Update
The next date highlighted in NASA’s article is November 18, 2026, when Voyager 1 is expected to reach one light-day from the Sun. NASA points readers to its Voyager tracking page for spacecraft positions and to a video explaining distances across the inner and outer solar systems and beyond.
Until that date, the Deep Space Network will continue to track the spacecraft, according to NASA’s description. The article does not announce a special event or a change to either probe’s mission for the milestone. Readers seeking a live position should consult NASA’s tracking resource rather than treat the article’s reported distance as current indefinitely.
Key Questions
What does one light-day mean?
A light-day is a distance: how far light travels in one day. NASA’s article puts Voyager 1’s milestone at about 16.1 billion miles from the Sun.
When is Voyager 1 expected to reach one light-day?
NASA’s October 30, 2026, article gives November 18, 2026 as the expected date.
What is the heliopause?
NASA describes the heliopause as the boundary where the Sun’s solar wind meets the interstellar medium. Voyager 1 crossed it in August 2012 and Voyager 2 in November 2018, according to the article.
What is on the Voyager Golden Record?
Each spacecraft carries a 12-inch record with greetings in 55 languages, 27 musical tracks, 116 images and other sounds from Earth. Its cover includes etched information about the Sun’s position and instructions for playing the record.
Source: science.nasa.gov
