SOLAR SYSTEM

Detailed explanation-1: -On Aug. 25, 2012, Voyager 1 flew beyond the heliopause and entered interstellar space, making it the first human-made object to explore this new territory. At the time, it was at a distance of about 122 AU, or about 11 billion miles (18 billion kilometers) from the sun.

Detailed explanation-2: -Voyager 1 almost didn’t get off the ground at its launch, as its rocket came within 3.5 seconds of running out of fuel on Sept. 5, 1977. But the probe made it safely to space and raced past its twin after launch, getting beyond the main asteroid belt between Mars and Jupiter before Voyager 2 did.

Detailed explanation-3: -The first of a pair of spacecraft, Voyager 2 lifted off on Aug. 20, 1977. NASA’s Jet Propulsion Laboratory in Southern California manages the spacecraft on their missions to explore the outer planets and beyond.

Detailed explanation-4: -Planetary Tour Between them, Voyager 1 and 2 explored all the giant planets of our outer solar system, Jupiter, Saturn, Uranus and Neptune; 48 of their moons; and the unique system of rings and magnetic fields those planets possess.