2025年1月23日 · Four robotic spacecraft have visited Saturn. NASA’s Pioneer 11 provided the first close look in September 1979. NASA’s twin Voyager 1 and Voyager 2 spacecraft followed up with flybys nine months apart in 1980 and 1981. Each flyby revealed intriguing details about the ringed giant world, but it wasn’t until Cassini arrived in orbit in 2004 that our understanding of …

2024年11月5日 · Orbit and Rotation. Saturn has the second-shortest day in the solar system. One day on Saturn takes only 10.7 hours (the time it takes for Saturn to rotate or spin around once), and Saturn makes a complete orbit around the Sun (a year in Saturnian time) in about 29.4 Earth years (10,756 Earth days).

2025年1月17日 · Saturn has 146 moons in its orbit, more than any other planet. The moons range in size from larger than the planet Mercury – the giant moon Titan – to as small as a sports arena. The small moon Enceladus has a global ocean under a thick, icy shell. Scientists have identified both moons as high-priority science destinations for future deep space missions.

2019年4月22日 · A 3D model of Saturn, the ringed gas giant planet. National Aeronautics and Space Administration. NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery.

2024年11月5日 · After two decades in space, NASA’s Cassini spacecraft ended its remarkable journey of exploration. Having expended almost every bit of the rocket propellant it carried to Saturn, operators deliberately plunged Cassini into the planet to ensure Saturn’s moons remain pristine for future exploration—in particular, the ice-covered, ocean-bearing moon Enceladus, …

2024年11月5日 · Saturn: Exploration. Four robotic spacecraft have visited Saturn. NASA’s Pioneer 11 provided the first close look in September 1979. NASA’s twin Voyager 1 and Voyager 2 spacecraft followed up with flybys nine months apart in 1980 and 1981.. Each flyby revealed intriguing details about the ringed giant world, but it wasn’t until the international Cassini …

2025年1月17日 · Introduction. The Voyager and Pioneer flybys of the 1970s and 1980s provided rough sketches of Saturn’s moons. But during its many years in Saturn orbit, NASA’s Cassini spacecraft discovered previously unknown moons, solved mysteries about known ones, studied their interactions with the rings and uncovered new mysteries – including the discovery on an …

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2024年4月10日 · he Voyager 1 and 2 Saturn encounters occurred nine months apart, in November 1980 and August 1981. Voyager 1 and 2 are now en route out of the solar system.

2025年1月22日 · Jupiter is the fifth planet from the Sun, and the largest in the solar system – more than twice as massive as the other planets combined.