Mercury is very different from the other planets in our solar system. Scientists have a lot of questions about how this mysterious planet works. The closest planet to the sun, Mercury, is difficult for scientists to study! However, scientists have figured out ways to get up close to the mysterious Mercury. Young readers will discover why Mercury doesn't have moons and what we've learned from our missions to Mercury. With interesting facts, beautiful...

Saturn is famous for its rings. This very windy planet has another claim to fame, it has the most moons of all eight planets! Discover more amazing facts about the sixth planet in the solar system!

Gas giants are massive planets that are made of mostly helium and hydrogen gas. The massive planets are bigger than many of the other planets in our solar system, and the biggest of them all is Jupiter! Not only is Jupiter the biggest gas giant, it's also the biggest planet in our solar system. Young astronauts will love learning the mysteries of this strange planet while comparing it to our own home world. With photographs pared with approachable...

The third largest planet in our solar system, Uranus, is the farthest planet in our solar system that can still be seen without a telescope! This planet is not only different in the way it looks, but also the way it spins! Unlike other planets, Uranus spins completely sideways. Young readers will want to take a coat on this freezing adventure, as they jump into what we know about this planet. With approachable text, even the most reluctant readers...

Uranus is the seventh planet from the sun and has a special feature, it tilts! Discover the mysteries of this ice giant that sits half in darkness for more than 40 years at a time!

Scientists believe that Mars may have been like the Earth in the past. In fact, they believe Mars may have had water! Our next-door neighbor in space, young readers will love reading about the red planet. Discover not only what we already know about this planet, but also the hopes that scientists have for future missions! Young readers will put themselves in the shoes of astronauts as they discover what makes Mars so much like Earth and interesting...

While Mars might be the planet scientists think is the most like Earth, Venus is actually Earth's closest neighbor! But because of a thick layer of toxic gasses, scientists believe it's impossible for Venus to support life as we know it. Beneath the planet's poisonous mask is a hot, unfriendly environment. Young astronauts will love learning not only about the mysteriousness of Venus, but also what else about this planet is so deadly! With fun, approachable...

Everything about Jupiter is big! Its size is big. Even its storms are big! Get the big and small facts about this gas giant that can be seen glowing in the night sky.