Launched in 1977, Voyager 1 is humanity’s most distant spacecraft — yet after nearly 49 years it still hasn’t traveled 1 light-day. It’s about 166 AU (≈24.8 billion km/15.4 billion miles) from Earth, showing just how immense interstellar space truly is.

Launched in 1977, Voyager 1 is humanity’s most distant spacecraft — yet after nearly 49 years it still hasn’t traveled 1 light-day. It’s about 166 AU (≈24.8 billion km/15.4 billion miles) from Earth, showing just how immense interstellar space truly is.