NASA’s Voyager 1 left Earth in 1977; now its signal takes over 22 hours to reach us and it is still sending data

When NASA launched Voyager 1 in September 1977, it was expected to explore the outer planets before continuing its journey into deep space. Nearly 49 years later, the spacecraft is still continues to send information back to Earth from about 25 billion kilometres away, making it the most distant human-made object ever built.

Raccontata datimesofindia.indiatimes.com