NASA, PBS marking 40 years since Voyager spacecraft launches

CAPE CANAVERAL, Fla.— Forty years after blasting off, Earth's most distant ambassadors—the twin Voyager spacecraft—are carrying sounds and music of our planet ever deeper into the cosmos.

Think of them as messages in bottles meant for anyone—or anything—out there.

This Sunday marks the 40th anniversary of NASA's launch of Voyager 2, now almost 11 billion miles distant. It departed from Cape Canaveral on Aug. 20, 1977 to explore Jupiter and Saturn.

Voyager 1 followed a few weeks later and is ahead of Voyager 2. It's humanity's farthest spacecraft at 13 billion miles away and is the world's only craft to reach interstellar space, the vast mostly emptiness between star systems. Voyager 2 is expected to cross that boundary during the next few years.

Each carries a 12-inch, gold-plated copper phonograph record (there were no CDs or MP3s back then) containing messages from Earth: Beethoven's Fifth, chirping crickets, a baby's cry, a kiss, wind and rain, a thunderous moon rocket launch, African pygmy songs, Solomon Island panpipes, a Peruvian wedding song and greetings in dozens of languages. There are also more than 100 electronic images on each record showing 20th-century life, traffic jams and all.

NASA is marking the anniversary of its back-to-back Voyager launches with tweets, reminisces and still captivating photos of Jupiter, Saturn, Uranus and Neptune taken by the Voyagers from 1979 through the 1980s.

Public television is also paying tribute with a documentary, "The Farthest - Voyager in Space," airing Wednesday on PBS at 9 p.m. EDT.

The two-hour documentary describes the tense and dramatic behind-the-scenes effort that culminated in the wildly successful missions to our solar system's outer planets and beyond. More than 20 team members are interviewed, many of them long retired. There's original TV footage throughout, including a lookback at the late astronomer Carl Sagan of the 1980 PBS series "Cosmos." It also includes an interview with Sagan's son, Nick, who at 6 years old provided the English message: "Hello from the children of Planet Earth."

Associated Press n This undated image provided by NASA shows the cover of the 12-inch gold-plated copper disk that both Voyager spacecraft carry. The phonograph record contains sounds and images selected to portray the diversity of life and culture on Earth.