On January 7, 1610, Italian astronomer Galileo Galilei turned his newly developed telescope to Jupiter. He discovered four objects orbiting the giant planet. It took him another night’s observations to clearly distinguish between two of them. He called them “The Medicean planets”, after the Medici family (who ruled Italy at the time), and gave them numbers. German astronomer Simon Marius also claimed to have seen these objects at about the same time. He never published any documentation, and the credit was given to Galileo. It was nearly 250 years later before they were given names. They are now known as the Galilean moons, Io, Europa, Ganymede and Callisto. They were created at the same time as Jupiter and contain 99.999 percent of all the mass in orbit around Jupiter. How much do you know about these moons? What would Ganymede be called if it did not orbit Jupiter? What is the most volcanic place in our solar system? Why does Europa have spots? Which moon is a good candidate for containing life? Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. Educational Versions include exercises designed to meet Common Core standards. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.

On January 7, 1610, Italian astronomer Galileo Galilei turned his newly developed telescope to Jupiter. He discovered four objects orbiting the giant planet. It took him another night’s observations to clearly distinguish between two of them. He called them “The Medicean planets”, after the Medici family (who ruled Italy at the time), and gave them numbers. German astronomer Simon Marius also claimed to have seen these objects at about the same time. He never published any documentation, and the credit was given to Galileo. It was nearly 250 years later before they were given names. They are now known as the Galilean moons, Io, Europa, Ganymede and Callisto. They were created at the same time as Jupiter and contain 99.999 percent of all the mass in orbit around Jupiter. How much do you know about these moons? What would Ganymede be called if it did not orbit Jupiter? What is the most volcanic place in our solar system? Why does Europa have spots? Which moon is a good candidate for containing life? Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.

There are eight regular satellites in orbit around Jupiter. These are moons that formed within the gravity field of Jupiter. They were formed at the same time and out of the same material as the planet itself. They have circular orbits and orbit in the same direction as the planet. The four largest are the Galilean moons. These are the ones seen from any telescope on Earth. But there are four more moons. These little known moons are odd shaped. They orbit close to the planet, providing the material that makes up Jupiter’s ring system. In order from Jupiter they are Metis, Adrastea, Amalthea and Thebe. This book is about these four moons. How much do you know about these moons? Do you know: How many rings does Jupiter have? How do these moons make the rings of Jupiter? What happens to Jupiter's rings? How big are the craters on Amalthea? What is the reddest object in our solar system? And much more. Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. Educational Versions include exercises designed to meet Common Core standards. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.

How big is Jupiter compared to all the other planets in our solar system combined? Is there a surface to the planet Jupiter? Does Jupiter rotate faster of slower than any other planet in our solar system? Is Jupiter growing or shrinking year after year? Learn the answer to these questions and many more fun facts in this 15-Minute Book. Jupiter is the largest planet in our solar system. It is a huge gas giant twirling in orbit around the sun. Here are some facts you might not know about Jupiter. The Educational Version has activities that meet Common Core Curriculum Standards. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Open the world of reading to a child by having them read for 15 minutes a day.

There are eight regular satellites in orbit around Jupiter. These are moons that formed within the gravity field of Jupiter. They were formed at the same time and out of the same material as the planet itself. They have circular orbits and orbit in the same direction as the planet. The four largest are the Galilean moons. These are the ones seen from any telescope on Earth. But there are four more moons. These little known moons are odd shaped. They orbit close to the planet, providing the material that makes up Jupiter’s ring system. In order from Jupiter they are Metis, Adrastea, Amalthea and Thebe. This book is about these four moons. How much do you know about these moons? Do you know: How many rings does Jupiter have? How do these moons make the rings of Jupiter? What happens to Jupiter's rings? How big are the craters on Amalthea? What is the reddest object in our solar system? And much more. Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.

Uranus is a planet with a mini solar system of rings and moons. Many of the moons formed with the planet. Some of them were captured later on. Some of the moons shepherd the rings and keep them from drifting apart. Other moons contribute to the rings and may have even created them. There are at least 27 moons orbiting Uranus. They are some of the biggest and tiniest moons in our solar system. This book looks at some of these moons. Do you know: Do all the moons rotate the same way around Uranus? What are shepherd moons? What are many of the moons made of? What kind of weather is there on the moons? What is Umbriel's cheerio made of? Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. Reading Level: 6.9 LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.

How big is Jupiter compared to all the other planets in our solar system combined? Is there a surface to the planet Jupiter? Does Jupiter rotate faster of slower than any other planet in our solar system? Is Jupiter growing or shrinking year after year? Learn the answer to these questions and many more fun facts in this 15-Minute Book. Jupiter is the largest planet in our solar system. It is a huge gas giant twirling in orbit around the sun. Here are some facts you might not know about Jupiter. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Open the world of reading to a child by having them read for 15 minutes a day.