science & techWikipedia1980 · Saturn
Voyager 1 swept past Saturn and gave humanity its first close look at the rings
On 12 November 1980 NASA's Voyager 1 made its closest approach to Saturn and took the first close images of its rings. The day before, it had passed Titan, Saturn's largest moon, and found a thick atmosphere that hid the surface. The pictures of the rings showed that what looked from Earth like a few broad bands were actually thousands of narrow ringlets, with structures such as a braided outer ring and dark 'spokes' that appeared and faded. To take these pictures, the probe's route bent it above Saturn's orbital plane, so it could not visit other planets afterwards.
Saturn's rings are made of countless pieces of ice, from dust grains to house-size chunks, orbiting in a thin disc. Gravity from nearby moons nudges the particles, creating gaps and narrow bands, and 'shepherd' moons can keep a ring edge sharp.
Voyager's images changed ideas about how rings behave: gravity from small moons shapes and confines them, and rings are not static. The mission's data guided later spacecraft, including Cassini, which orbited Saturn from 2004 to 2017. Voyager 1 is still travelling and is now in interstellar space.
Voyager 1 carries a golden record of sounds and images from Earth.
background
Voyager 1 is a space probe launched by NASA on September 5, 1977, as part of the Voyager program, to study the outer Solar System and the interstellar space beyond the Sun's heliosphere. It was launched 16 days after its twin, Voyager 2. It communicates through the NASA Deep Space Network (DSN) to receive routine commands and to transmit data to Earth. Real-time distance and velocity data are provided by NASA and JPL. At a distance of 173.02 AU (25.9 billion km; 16.1 billion mi) as of November 2026, it is the most distant human-made object from Earth. Voyager 1 is projected to reach a distance of one light day from Earth on November 18, 2026.
The probe made flybys of Jupiter, Saturn, and Saturn's largest moon, Titan. NASA had a choice of either conducting a Pluto or Titan flyby. Exploration of Titan took priority because it was known to have a substantial atmosphere. Voyager 1 studied the weather, magnetic fields, and rings of the two gas giants and was the first probe to provide detailed images of their moons.
From Wikipedia: Voyager 1 (CC BY-SA 4.0) ↗ · text CC BY-SA 4.0Adapted from Wikipedia, the free encyclopedia · CC BY-SA 4.0
Image: Wikimedia Commons
