OtterKnow Kids Encyclopedia

Spacecraft have flown past Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Rovers have driven around on Mars and taken thousands of pictures. Probes have orbited Jupiter and Saturn for years, studying their moons and rings. We even sent a probe to land on Titan, one of Saturn’s moons!

• The Voyager 2 spacecraft is the only one that has visited all four outer planets: Jupiter, Saturn, Uranus, and Neptune.
• No human has ever been farther than the Moon.
• Scientists are planning future missions to explore the icy moons of Jupiter and Saturn, where there might be hidden oceans!