Launched nearly 50 years ago in 1977, NASA’s #Voyager1 on Wednesday, Nov. 18 will have traveled one light-day from Earth, which is more than 25.9 billion kilometers - NASA will highlight this historic milestone with two events: https://www.nasa.gov/news-release/nasa-invites-media-public-to-join-voyager-1-one-light-day-activities/