“Space Traveler” offers essential travel advice for any aspiring astronaut planning to take the first steps on Earth’s fellow planets. You’ll travel to Jupiter, the King of the Planets, to Saturn, home of the greatest spectacle in the solar system, and to the ex-planet Pluto. You’ll need extra-strong sunscreen on Venus and Mercury, the closest planets to the sun. You’ll hike on Mars, the planet most similar to home. But steer clear of Uranus’ boiling ocean and Neptune’s cataclysmic winds!