Voyager: Exploring the Outer Planets
In 1977, NASA launched the space probes Voyager 1 and Voyager 2 to explore Jupiter, Saturn, Uranus, and Neptune. This book tells of what was known about those planets and their moons before the Voyager missions, as well as what Voyager discovered about those planets and their moons. This book is written for the middle-grade reader, and can be enjoyed by readers age 12 and up.
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Adrastea asteroid belt Astronomers think auroras back to Earth boost in speed bright cameras cause cloud tops color craters crust Dark Spot discovered Earth-years Earth’s atmosphere Earth’s moon Enceladus Epimetheus ﬁre ﬁrst ﬂights Galilean moons Ganymede GRAVITY BOOST gravity pulls Hyperion Iapetus impact crater Jupiter and Saturn Jupiter’s gravity Jupiter’s moons Known Before Voyager large moons launched layer magnetic ﬁeld main rings Mars metallic hydrogen miles Mimas moon’s surface NASA scientists Neptune Neptune’s Nereid nitrogen outer planets Phoebe planet’s atmosphere planet’s gravity planet’s Roche Limit planets and moons Pluto radio signals reach Jupiter reﬂect ring particles Roche Limit rock rotates Saturn Saturn’s moons scientiﬁc instruments Scientists believe Scientists think Solar System space probes spacecraft sulfur Sun’s telescopes Tethys thrusters Titan Stage Titan-Centaur rocket Titania Triton Umbriel Uranus Uranus and Neptune Uranus’s Venus volcanoes Voyager 2’s Voyager probes Voyager Project Voyager’s photographs showed Voyagers Found water ice