Saturn vs Jupiter

Giovanni Cassini

Giovanni Domenico Cassini was the founding director of the Paris Observatory. He discovered four of Saturn's moons and the dark gap in its rings now called the Cassini Division, and his measurement of the parallax of Mars helped fix the…

Pioneer 11

Pioneer 11 flew past Jupiter and became the first spacecraft to encounter Saturn.

Planet Planner

Which planets are visible tonight and where, from the platform's computed planetary positions and their altitudes through the night. Jupiter and Saturn to Mercury's fleeting apparitions.

Solar System

The Sun and the bodies gravitationally bound to it.

Solar System Explorer

An explorer of the Sun's family — the planets, their moons, and the small bodies between them. The data model carries each body's real orbital and physical parameters and is prepared for a future interactive three-dimensional scene; today it presents the ordered, to-scale structure of the system.

Voyager 1

Voyager 1 is a NASA space probe launched in 1977 that explored Jupiter and Saturn and has since become the most distant human-made object, traveling in interstellar space.

Voyager 2

Voyager 2 is a NASA space probe launched in 1977 and the only spacecraft to have flown past all four giant planets: Jupiter, Saturn, Uranus, and Neptune.

NASA

The Scientific Revolution

In little more than a century, astronomy was remade. The telescope opened the sky, Kepler found that planets move in ellipses, Galileo turned observation into evidence, and Newton's universal gravitation united the heavens and the Earth…

Mars