CAPE CANAVERAL, Fla. (AP) — 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 th...