Total Number of Spacecraft That Have Visited Saturn
As of the latest public records, a total of 4 spacecraft have visited Saturn, with 1 spacecraft currently in orbit and 3 others having completed flybys or impacted the planet. These missions were conducted by three space agencies, with NASA operating the majority of the probes and ESA contributing to one major mission. The first spacecraft to fly by Saturn was Pioneer 11 in 1979, followed by two Voyager probes in the early 1980s, and the Cassini orbiter which arrived in 2004 and ended its mission in 2017. The current count of spacecraft that have visited Saturn is expected to increase as new missions are planned and launched in the coming years. For a detailed timeline of every mission, see the overview from NASA's Solar System Exploration page NASA Solar System Exploration Saturn Overview.
Breakdown of Saturn Missions by Agency
NASA is responsible for 3 of the 4 spacecraft that have visited Saturn, including Pioneer 11, Voyager 1, and Voyager 2, all of which performed flybys. ESA contributed 1 spacecraft, the Cassini-Huygens mission, which included both an orbiter and a lander that reached Saturn's moon Titan. No other space agency has yet sent a spacecraft to Saturn, making NASA and ESA the only organizations to have achieved this milestone. The combined data from these missions has transformed our understanding of Saturn's rings, moons, and atmosphere. The total number of spacecraft that have visited Saturn is likely to remain at 4 until the next mission arrives in the 2030s.
Detailed Mission History and Flyby Data
Pioneer 11 was the first spacecraft to visit Saturn, performing a flyby in September 1979 and providing the first close-up images of the planet and its rings. Voyager 1 followed in November 1980, and Voyager 2 in August 1981, both returning high-resolution images and scientific data about Saturn's atmosphere and moons. The Cassini spacecraft, a joint NASA-ESA mission, entered Saturn orbit in July 2004 and conducted 13 years of detailed observations before its intentional plunge into Saturn's atmosphere in September 2017. The Huygens probe, part of the Cassini mission, landed on Titan in January 2005, becoming the first landing in the outer solar system. These four spacecraft represent the complete list of missions that have visited Saturn to date, with no other spacecraft having reached the planet or its system.
Key Scientific Discoveries from Each Mission
Pioneer 11 discovered Saturn's thin F-ring and identified temperature anomalies in the planet's atmosphere. The Voyager missions revealed the complex structure of Saturn's rings and discovered new moons, including the small shepherd moons that maintain ring gaps. Cassini provided the most comprehensive data set, discovering geysers on Enceladus, lakes of liquid methane on Titan, and detailed atmospheric dynamics including the hexagonal polar vortex. The total scientific output from these four missions has resulted in thousands of peer-reviewed papers and continues to influence planetary science research today.
Upcoming Missions and Future Count
NASA's Dragonfly mission, a rotorcraft lander, is scheduled to arrive in the Saturn system in the mid-2030s, which will increase the total number of spacecraft that have visited Saturn to 5. The mission will focus on exploring Titan's organic chemistry and habitability, building on the discoveries made by Cassini and Huygens. Other proposed missions to Saturn and its moons are under study by NASA and international partners, but none have been officially confirmed or launched yet. The current status of the Saturn mission count remains at 4 spacecraft until Dragonfly reaches