Voyager 1 Set to Reach One Light-day From Earth Nov. 18

WHO:

NASA - NASA is inviting media and the public to participate in activities related to Voyager 1’s one-light-day milestone.

NASA - Voyager 1 is the most distant human-made object.

WHAT:

NASA - Voyager 1 is set to reach a distance of one light-day from Earth, more than 16 billion miles (25.9 billion kilometers).

NASA - Light from Earth would take 24 hours to reach Voyager 1 at that distance.

CNET - Traveling one light-day took the space probe 49 years.

CNET - A human would take 612,015 years to walk one light-day.

WHEN:

NASA - The one-light-day milestone is expected on “Wednesday, Nov. 18.”

CNET - The milestone is expected on “Nov. 18.”

HOW:

NASA - Voyager 1 was launched in 1977.

(UPDATED November 10, 2026 20:07 UTC)

Voyager 1, humanity’s most distant spacecraft, is approaching a remarkable one-light-day milestone. At that distance, its signal takes 24 hours to travel from Earth. NASA invites the public to participate in activities ahead of the expected November 18 milestone.