Voyager 1, launched in 1977, has been journeying through space for over four decades, now more than 14.9 billion miles away from Earth. Recently, this legendary probe made headlines once again by crossing an invisible border that separates our solar system from the vast expanse of interstellar space. What it discovered there has left scientists astounded—a “wall of fire” where temperatures soar to an unimaginable 54,000 degrees Fahrenheit.
Since its launch, Voyager 1 has sent back breathtaking images of Jupiter, Saturn, and their moons. But its most daring journey began when it left the familiar territory of the planets behind and headed toward what is known as the heliopause. This is the vast boundary where the sun’s influence fades and the realm of interstellar space begins.