As of today Voyager 1 is one light-day from Earth - 25.9 billion km (16.1 billion miles) away.
A radio signal now takes 24 hours to reach it. In ~50 years, it has traveled about 1/1500th of the way to Alpha Centauri, our nearest star at 4.27 light-years.
Nearly 49 years after its launch, Voyager 1 is about to achieve a historic first: the only human-made object ever to cross the one-light-day mark—roughly 16 billion miles from Earth—pushing humanity’s reach into the true depths of interstellar space.