Part of the Exploring Our Solar System With The Planetary Society ® series
The third planet from the Sun, Earth is our home and the only planet we know of that holds life. Learn how Earth and the Moon orbit the Sun together, how continents form, and how the atmosphere protects. Then learn how satellites show us how Earth will ch
The Sun
Our Solar System's Star
Part of the Exploring Our Solar System With The Planetary Society ® series
The Sun is important for life on Earth. And it's much larger than the planets! From how the Sun formed to the spacecraft that have studied the Sun, learn all about the huge star at the center of our solar system.
Uranus
The Sideways Planet
Part of the Exploring Our Solar System With The Planetary Society ® series
With seasons that last for decades, Uranus is a planet of extremes. Young readers explore the seventh planet from the Sun through fun facts, tables, and colorful photographs.
Part of the Exploring Our Solar System With The Planetary Society ® series
Saturn's rings are a marvel, but what else makes the planet unique? Explore what makes Saturn a gas giant and what its rings are made up of, among more fun facts.
Part of the Exploring Our Solar System With The Planetary Society ® series
Mars is known as the Red Planet. It is the fourth planet from the Sun and the only planet where humans have landed rovers. From the biggest volcano in the solar system to ancient riverbeds, learn why scientists are so interested in the Red Planet.
Dwarf Planets
Small Round Worlds
Part of the Exploring Our Solar System With The Planetary Society ® series
How many dwarf planets are in our solar system? What makes them different from planets? And how long does it take them to go around the Sun? From Pluto to Haumea, discover what scientists have learned about these interesting space objects.
Jupiter
The Largest Planet
Part of the Exploring Our Solar System With The Planetary Society ® series
Jupiter is more than just a gas giant. It is the largest planet in the solar system! Readers will love discovering Jupiter's Great Red Spot, its many moons, and more.
Mercury
A World of Extremes
Part of the Exploring Our Solar System With The Planetary Society ® series
Mercury is the smallest planet in our Solar System. And it’s the fastest planet! Learn how Mercury is like Earth’s Moon. Then discover the history of exploring Mercury, what we have found on the planet’s surface, and other fun facts!
Neptune
Planet of Wind and Ice
Part of the Exploring Our Solar System With The Planetary Society ® series
Neptune, the farthest planet from our Sun, is a dark and windy planet. How do scientists observe a planet so far away? Young space fans discover Neptune's rings, moons, and ice through bright photos and colorful diagrams.
The Moon
Our Nearest Neighbor
Part of the Exploring Our Solar System With The Planetary Society ® series
The Moon is our neighbor in space. And its orbit is slowly moving farther away from Earth each year. Learn about the Moon's phases, the history of exploring the Moon, what we have discovered on the Moon's surface, and more fun facts!
Part of the Exploring Our Solar System With The Planetary Society ® series
Venus is the hottest planet in our Solar System. And it’s often called Earth’s twin! Discover why Venus is so hot. Then learn about Venus’s volcanoes and clouds and how we use spacecraft to learn more about this amazing planet.
Asteroids and Comets
Orbiting Space Rocks
Part of the Exploring Our Solar System With The Planetary Society ® series
Each asteroid and comet is unique. But what makes them unique, and why are these space objects so interesting to scientists? Learn about the first spacecraft to visit an asteroid, what gives a comet its tails, and much more!
